The Ultimate Affiliate Marketing Follow Along: From Zero to Your First Commission

The Ultimate Affiliate Marketing Follow Along: From Zero to Your First Commission

The Ultimate Affiliate Marketing Follow Along: From Zero to Your First Commission

The Ultimate Affiliate Marketing Follow Along: From Zero to Your First Commission

1. Welcome to Your Affiliate Marketing Journey

Alright, settle in. You’ve just landed in the right place if you’re tired of the noise, the gurus, the flashy screenshots, and the endless, often contradictory advice floating around the internet about affiliate marketing. I’ve been there, spinning my wheels, chasing the next shiny object, feeling like I was constantly missing some secret ingredient. But here’s the thing: there isn’t one. There’s just a solid, repeatable process, and that’s precisely what this "Ultimate Affiliate Marketing Follow Along" is all about. Consider this your personal roadmap, your no-BS guide, from someone who’s navigated these waters and made plenty of mistakes so you don’t have to. We’re not just talking theory here; we’re talking about getting your hands dirty, step-by-step, all the way to that glorious first commission and beyond.

1.1. What is an "Affiliate Marketing Follow Along"?

So, what exactly is an "affiliate marketing follow along"? Forget your typical blog post or even a comprehensive course that dumps a mountain of information on you and then wishes you good luck. This is something entirely different. Imagine me, your seasoned mentor, sitting right next to you, guiding your mouse, looking over your shoulder as you build out your affiliate business. That's the spirit of a follow along. It’s a step-by-step, practical blueprint designed for real-time application. We're going to define concepts, yes, but immediately after, we'll talk about how to implement them. This isn't just about understanding the 'what'; it's deeply rooted in the 'how' and 'why now'.

The core idea is to break down what can feel like an overwhelming Everest into manageable, actionable steps. Many guides out there are fantastic for information, but they often lack the crucial element of implementation. A follow along fills that void, providing a structured path where each section builds upon the last. You're not just reading; you're doing. You're applying. You're experimenting. It’s like having a detailed recipe for a complex dish, but instead of just reading the ingredients and steps, I’m showing you how to chop the vegetables, sauté the aromatics, and when to taste for seasoning. This iterative process is what demystifies affiliate marketing, transforming it from a cryptic art into a tangible, achievable skill.

Think of it as your personal project manager, constantly nudging you forward, ensuring you don't get stuck in analysis paralysis or veer off course into the rabbit hole of endless research. We'll tackle everything from the initial spark of an idea to the nuts and bolts of setting up your digital presence, crafting compelling content, driving traffic, and ultimately, converting that traffic into income. This hands-on approach is designed to foster confidence, build practical skills, and cultivate a deep understanding of the mechanics behind a successful affiliate operation. You’ll develop a practical skillset that transcends mere theoretical knowledge, equipping you to adapt and innovate as the digital landscape evolves.

#### Insider Note: The "Why" Behind the "How"
Often, people jump straight to the "how" without understanding the "why." A follow along forces you to slow down, absorb the foundational principles, and then apply them. This deep understanding is what differentiates a flash-in-the-pan success from a sustainable, long-term business. Don't skip the foundational steps; they are the bedrock upon which everything else is built.

1.2. Why Follow This Guide?

Now, you might be thinking, "There are a million guides out there. Why this one?" And that's a fair question. The internet is a vast ocean of information, much of it contradictory, some of it outdated, and a good chunk of it, frankly, just plain wrong. The primary benefit of sticking with this structured follow-along is to demystify the entire process. No more guesswork. No more piecing together fragments of advice from disparate sources, trying to figure out if they even apply to your specific situation. We're cutting through the noise and giving you a clear, actionable roadmap that has been refined through years of trial and error.

One of the biggest pitfalls for beginners, and honestly, even for experienced marketers, is the dreaded "shiny object syndrome." You start down one path, see someone touting another "easier" or "faster" method, and suddenly you're off chasing a new strategy, abandoning what you've already started. This guide aims to be your anchor. By providing a coherent, step-by-step journey, we aim to help you avoid those common pitfalls. We'll address the "what ifs," the "but what abouts," and the "I'm stuck heres" before they even become major roadblocks. This isn't just about learning; it's about executing with confidence and clarity, minimizing the wasted time and effort that often plagues new ventures.

Moreover, this follow along is built on actionable strategies. We're not just going to talk about "good content"; we're going to dive into how to create high-value content that resonates with your audience and search engines alike. We're not just going to say "drive traffic"; we'll explore specific, repeatable methods for getting eyes on your offers. This structured approach is designed to accelerate your learning curve significantly. Instead of spending months or even years trying to figure things out through sheer osmosis or painful mistakes, you'll be leveraging proven frameworks and insights from the get-go. It's about efficiency, effectiveness, and building momentum without getting bogged down in unnecessary complexities.

I remember when I first started, the sheer volume of information felt like trying to drink from a firehose. I spent countless hours watching YouTube videos, reading blog posts, and buying courses, only to feel more confused than when I started. The missing piece was always a cohesive, start-to-finish plan that I could simply follow. This guide is that missing piece. It's designed to be the guide I wish I had back then—honest, practical, and relentlessly focused on getting you to your first commission, and then showing you how to scale from there. It's about empowerment through structured learning, turning your ambition into tangible results.

1.3. Setting Realistic Expectations for Success

Let's get something straight right now, right at the beginning. If you've come here looking for a "get rich quick" scheme, you're in the wrong place. Seriously, stop reading. Affiliate marketing, when done correctly, is a legitimate, powerful, and incredibly rewarding business model. But like any legitimate business, it requires consistent effort, patience, and continuous learning. There's no magic button, no secret loophole, and certainly no overnight millions waiting for you. Anyone promising otherwise is selling you a fantasy, and probably their own overpriced "system." My goal here is to paint a clear, unvarnished picture of what it truly takes.

Success in affiliate marketing is a marathon, not a sprint. You're building an asset, a digital presence that will serve you for years to come. This means you’ll encounter challenges, you’ll have days where you feel like you’re making no progress, and you’ll need to adapt to changes in algorithms, market trends, and consumer behavior. It demands resilience. I’ve seen countless aspiring affiliates throw in the towel after a few weeks or months because they didn’t see immediate results. They started with unrealistic expectations, fueled by social media highlights and misleading advertisements. The reality is, your first commission might take weeks, or even a few months, to materialize. That’s normal. That’s part of the process.

The "consistent effort" part often gets overlooked. This isn't a passive income stream you set up once and forget. It requires ongoing content creation, promotion, optimization, and engagement. Think of it like nurturing a garden: you plant the seeds, water them regularly, weed out the undesirable elements, and continually tend to them. You don't just throw seeds on the ground and expect a harvest next week. Similarly, you'll be consistently refining your niche, testing different offers, analyzing your traffic sources, and improving your content. It’s an iterative process of learning, implementing, measuring, and adjusting.

#### Pro-Tip: The 90-Day Mindset
Commit to a minimum of 90 days of consistent effort before you even begin to evaluate your progress. In these 90 days, focus purely on learning and implementation, not on immediate financial returns. This mindset shift is crucial for overcoming early frustrations and building momentum. Many quit just before their efforts start to compound.

Finally, "continuous learning" is not optional; it's essential. The digital landscape is constantly evolving. What works today might be less effective tomorrow. New tools emerge, algorithms shift, and consumer preferences change. To stay ahead, or even just keep pace, you must embrace a student's mindset. Be curious, be experimental, and be willing to unlearn and relearn. This follow-along will give you a robust foundation, but your journey of growth as an affiliate marketer will never truly end. It's an exciting, dynamic field, but it rewards those who are committed to the long haul, understand the value of patience, and embrace the grind with a positive, problem-solving attitude.

2. Laying the Foundation: The Pre-Launch Checklist

Alright, with our expectations set and our mental game strong, it's time to get down to the brass tacks. Think of this section as preparing the ground before you even think about planting seeds. Rushing this foundational stage is a rookie mistake I see time and time again, and it almost always leads to wasted effort, frustration, and ultimately, giving up. We're going to build this house on a solid rock, not on shifting sand. This pre-launch checklist isn't just a list of things to do; it's a strategic framework designed to set you up for sustainable success. Don’t skip steps here, no matter how tempting it might be to jump straight to the "money-making" parts. The money comes after the foundation is laid correctly.

2.1. Niche Selection: The Cornerstone of Profitability

If there's one decision that will dictate the trajectory of your affiliate marketing journey more than any other, it's your niche selection. This isn't just about picking a topic you're interested in; it's about strategically identifying a profitable segment of the market where you can genuinely add value and stand out. I remember when I first started, I thought I could just promote anything and everything. Big mistake. I spread myself too thin, became a jack-of-all-trades and master of none, and my content lacked focus. The result? Crickets. You need to narrow your focus, become an authority, and speak directly to a specific audience with specific problems.

Strategies for identifying profitable niches often start with a blend of personal interest and market demand. While it's great to be passionate about a topic, passion alone won't pay the bills if there's no commercial intent or viable products to promote. Conversely, chasing a purely profitable niche you have zero interest in can lead to burnout and uninspired content. The sweet spot is the intersection of "what I care about/know about" and "what people are actively spending money on and searching for solutions to." This requires a bit of detective work. Start by brainstorming areas where you have expertise, hobbies, or even just a genuine curiosity. Do you love gaming? Are you obsessed with sustainable living? Do you have a knack for productivity hacks?

Once you have a few ideas, it's time for market research – and this is where the rubber meets the road. Don't rely on gut feelings. You need data. Look for evidence of demand: are people searching for solutions related to your niche (use keyword research tools like Ahrefs, SEMrush, Ubersuggest)? Are there existing communities (forums, Facebook groups, subreddits) discussing these topics? Are there already successful affiliate sites or products in this space (a good sign of profitability, not necessarily saturation)? Pay attention to competition, but don't be scared off by it entirely. High competition can often signify high demand. Your goal isn't to avoid competition, but to find an angle, a sub-niche, or a unique selling proposition that allows you to differentiate yourself.

Understanding demand versus competition is a delicate balance. A niche with no competition might seem appealing, but it often means there's no demand or no money to be made. A highly competitive niche like "weight loss" or "make money online" can be incredibly lucrative, but requires a far more sophisticated strategy to break in. For beginners, I often recommend looking for "micro-niches" within larger categories. Instead of "fitness," think "fitness for busy moms over 40." Instead of "pet supplies," think "eco-friendly cat toys for indoor cats." These smaller segments still have plenty of demand but often have less entrenched competition, allowing you to build authority and gain traction more quickly. This focused approach allows you to become the go-to resource for a specific problem, fostering trust and making your recommendations far more impactful.

#### Pro-Tip: The "Problem-Solution" Framework
Every profitable niche revolves around solving a problem. Identify the pain points, frustrations, or desires of your target audience. Your affiliate products will be the solutions you recommend. The clearer you are on the problem, the easier it is to find relevant products and create content that resonates.

2.2. Choosing Your First Affiliate Programs & Products

Once your niche is locked in, the next logical step is to identify the products and services you'll actually be promoting. This isn't a random grab-bag; it's a strategic selection process focused on high-converting offers that truly benefit your audience. Your credibility as an affiliate hinges entirely on the quality and relevance of your recommendations. If you promote subpar products just for a quick buck, your audience will see through it, and you'll quickly lose their trust – and trust, my friend, is the currency of affiliate marketing. Always, always prioritize your audience's needs and genuinely believe in what you're promoting.

Criteria for selecting high-converting offers are multifaceted. Firstly, relevance to your niche is paramount. Don't promote a dog training course if your audience is interested in vegan recipes. Secondly, look for products with a strong track record and good reviews. A product that already sells well and has satisfied customers is a much safer bet. Thirdly, consider the commission structure. While a high commission percentage is attractive, also look at the average order value (AOV) and the cookie duration. A product with a lower percentage but a high AOV might yield more per sale. A longer cookie duration (e.g., 60 or 90 days instead of 24 hours) gives you more time for the customer to convert after clicking your link. Finally, evaluate the sales page and marketing materials provided by the vendor. Are they professional? Do they clearly articulate the product's benefits?

Exploring reputable networks is a great starting point for beginners. Amazon Associates is often the first stop for physical products due to its massive catalog and unparalleled trust factor, though commissions can be low. For digital products, especially in niches like health, fitness, finance, and personal development, ClickBank is a veteran player, known for higher commissions on information products. ShareASale offers a diverse range of products, both physical and digital, across many categories, making it excellent for exploring different options. Impact.com and CJ Affiliate (formerly Commission Junction) are also powerhouses, hosting thousands of well-known brands across various industries. Don't overlook direct partnerships with SaaS (Software as a Service) companies; many offer generous recurring commissions for their software products, which can build a stable, long-term income stream.

Beyond the big networks, consider direct partnerships. If you use a particular software or service in your niche and love it, check if they have an affiliate program directly on their website. These direct programs often offer better commission rates and more personalized support. For example, if you're in the web development niche, promoting a specific hosting provider or a WordPress theme builder directly through their partner program can be incredibly lucrative. The key is to diversify your options but not to overwhelm yourself. Start with 2-3 solid programs that offer products you genuinely believe in and that directly address the needs of your target audience. Remember, quality over quantity. Your goal is to be a trusted curator, not a spammy salesperson.

2.3. Your Digital Hub: Website, Social Media, or Email List?

This is a pivotal decision, especially for beginners. Where will you direct your audience? Where will you build your authority and house your content? While ideally, you'll leverage a combination of these platforms over time, for a follow along starting from zero, it's wise to pick a primary hub to focus your initial efforts. Each has its pros and cons, and the "best" choice often depends on your niche, your long-term goals, and your comfort level with different technologies. This isn't just about presence; it's about control, longevity, and building a sustainable asset.

Building a website (typically a blog) is, in my somewhat opinionated view, the gold standard for long-term affiliate marketing success. Why? Because you own it. You have complete control over the content, design, monetization, and data. You're not subject to the whims of an algorithm change or a platform's terms of service. A website allows you to create evergreen content that ranks in search engines for years, bringing in passive organic traffic. It also provides a central hub for all your recommendations, reviews, and resources. The cons? It has a steeper learning curve (though modern website builders make it much easier), requires some initial investment (hosting, domain), and takes time to build authority and rank. However, the payoff in terms of stability and control is unparalleled.

Leveraging social media can be incredibly powerful, especially for niches that thrive on visual content (fashion, fitness, food) or direct engagement (coaching, personal branding). Platforms like Instagram, TikTok, YouTube, or even Facebook Groups can provide immediate reach and foster strong community connections. The pros are low barrier to entry, potential for rapid viral growth, and direct interaction with your audience. The cons, however, are significant: you don't own the platform. Your content can be removed, your account banned, and your reach throttled by algorithm changes at any moment. It's difficult to build long-form, in-depth content that truly converts, and driving traffic directly to affiliate links can sometimes violate platform rules. Social media is fantastic for awareness and traffic generation, but it's often best used to funnel people to a platform you own, like your website or email list.

Focusing on an email list from day one is arguably one of the smartest long-term strategies, regardless of your primary hub. Email marketing gives you direct access to your audience, bypassing algorithms and platform restrictions. It allows for personalized communication, building deeper relationships, and promoting offers directly to a highly engaged segment of your audience. The pros are incredibly high ROI, direct communication, and audience ownership. The cons are that you still need a way to build that list (often requiring a website or social media presence), and it requires consistent effort in crafting valuable emails. For beginners, while you might not start with email as your only hub, you should definitely plan to integrate email list building very early on, seeing it as a critical asset that will grow alongside your primary platform.

My recommendation for most beginners in this follow along? Start with a website (blog). It provides the most stability, control, and long-term potential. Then, strategically use social media to drive traffic to your website and integrate email list building on your website. This creates a powerful, interconnected ecosystem where you control the core asset.

2.4. Essential Tools & Software Setup for Beginners

Navigating the world of digital tools can feel like trying to choose a single candy from a sprawling, overwhelming candy store. There are thousands of options, each promising to be the magic bullet. But for starting out, you don't need all the bells and whistles. You need a lean, effective toolkit that covers the essentials without breaking the bank or overwhelming your learning capacity. Think of these as your foundational workbench tools – a good hammer, a reliable saw, and a sturdy measuring tape. We're not building a skyscraper yet; we're building a solid shed.

Here’s a breakdown of must-have tools for your initial setup:

  • Hosting & Domain Name:
* Purpose: Your website's address on the internet (domain) and where its files live (hosting). * Beginner Recommendation: Bluehost or SiteGround. They offer affordable shared hosting plans, one-click WordPress installation, and good customer support. Bluehost often includes a free domain name for the first year. Don't cheap out too much here; reliable hosting is crucial for site speed and uptime. * Why it's essential: Without these, your website simply doesn't exist online.
  • Website Builder/Content Management System (CMS):
* Purpose: To easily create and manage your website content without needing to code. * Beginner Recommendation: WordPress.org (self-hosted). It powers over 40% of the internet, is incredibly flexible, and has a vast ecosystem of themes and plugins. While it has a slight learning curve, the long-term benefits are immense. Pair it with a user-friendly page builder plugin like Elementor or Beaver Builder for drag-and-drop design. * Why it's essential: Makes website creation accessible to non-coders and scalable for future growth.
  • Email Autoresponder:
* Purpose: To build and manage your email list, send automated email sequences, and broadcast newsletters. * Beginner Recommendation: MailerLite or GetResponse. Both offer generous free or affordable plans for beginners, are relatively easy to use, and have essential features like landing page builders and automation. * Why it's essential: Your email list is a critical asset for direct communication, relationship building, and driving conversions, independent of external platforms.
  • Keyword Research Tool:
* Purpose: To find out what your target audience is searching for, gauge search volume, and analyze competition. * Beginner Recommendation: Ubersuggest (free tier is good for starters, paid is affordable) or Google Keyword Planner (free with a Google Ads account). For more advanced insights later, consider Ahrefs or SEMrush (pricier, but industry-standard). * Why it's essential: Guides your content strategy, ensuring you're creating content that people actually want to read and that has a chance to rank in search engines.
  • Analytics Tool:
* Purpose: To track website traffic, user behavior, and conversion rates. * Beginner Recommendation: Google Analytics 4 (GA4). It's free and incredibly powerful, providing deep insights into how users interact with your site. * Why it's essential: "What gets measured, gets managed." You need data to understand what's working, what's not, and where to optimize your efforts.

Start with these core tools. You don't need expensive subscriptions right away. Many offer free trials or free tiers that are perfectly adequate for getting started. Invest your time in learning to use them effectively rather than chasing every new tool that pops up. Remember, the tools are there to streamline your operations, not complicate them.

3. Content Creation Strategy: Attracting & Engaging Your Audience

Alright, we've laid the groundwork, chosen our niche, picked our products, and set up our digital home. Now, it's time for the heart and soul of your affiliate business: content. This is where you connect with your audience, build trust, demonstrate your expertise, and ultimately guide them towards the solutions you're recommending. Without compelling, high-value content, your digital hub is just an empty storefront. This isn’t just about writing; it’s about understanding human psychology, solving problems, and being genuinely helpful. Forget the idea of simply slapping up a product review; we’re going much deeper than that.

3.1. Understanding Your Target Audience & Their Search Intent

Before you even think about writing a single word, you must understand who you're writing for. This isn't a vague concept; it's about getting into the head of your ideal reader, understanding their desires, their fears, their questions, and their motivations. This is where creating buyer personas comes in. A buyer persona isn't just a demographic profile; it's a semi-fictional representation of your ideal customer, based on market research and real data about your existing customers. Give them a name, an age, a job, hobbies, pain points, and goals. The more detailed you get, the easier it will be to tailor your content directly to them.

Once you have a clear picture of your persona, you need to understand their search intent. Why are they searching? What are they hoping to achieve or find? There are generally four main types of search intent:

  • Informational Intent: The user is looking for information or answers to a question (e.g., "how to start affiliate marketing," "best protein for muscle gain"). They're in the learning phase.
  • Navigational Intent: The user is trying to find a specific website or page (e.g., "Amazon login," "Facebook"). Less relevant for affiliate content unless you're reviewing a specific brand.
  • Commercial Investigation Intent: The user is researching a product or service before making a purchase (e.g., "Bluehost vs. SiteGround," "best running shoes for flat feet reviews"). This is a sweet spot for affiliate content!
  • Transactional Intent: The user is ready to buy (e.g., "buy iPhone 15," "Elementor Pro discount code"). They need a final nudge and a clear path to purchase.
Mapping your content to different stages of the buyer's journey, which aligns with these search intents, is crucial. At the awareness stage (informational intent), your content should focus on educating, answering broad questions, and introducing problems or opportunities. At the consideration stage (commercial investigation intent), your content should compare solutions, offer in-depth reviews, and help the user evaluate their options. Finally, at the decision stage (transactional intent), your content should provide direct recommendations, offer incentives, and make the purchase process as smooth as possible.

By deeply understanding your audience and their intent, you can address specific pain points and desires with surgical precision. If your persona is a "busy mom over 40 trying to get fit," your content shouldn't just be generic fitness advice. It should address her specific challenges: limited time, hormonal changes, finding workouts that fit her schedule, and healthy meal prep that's family-friendly. This level of specificity creates a powerful connection, building trust and positioning you as the go-to expert who truly understands her struggles and offers relevant solutions (your affiliate products!). This empathetic approach is what transforms casual readers into loyal followers and, ultimately, satisfied customers.

3.2. Crafting High-Value Content: Beyond Basic Reviews

Forget the idea that affiliate marketing is just about churning out quick, flimsy reviews. In today's crowded digital landscape, that approach is a fast track to obscurity. To stand out, to build authority, and to genuinely help your audience (which, remember, leads to commissions), you need to craft high-value content. This means going above and beyond, providing depth, insight, and actionable information that readers can't easily find elsewhere. Your content should be so good that people bookmark it, share it, and return to your site as a trusted resource.

Let's break down diverse content types that go way beyond a basic product overview:

In-depth Tutorials/How-To Guides: These are incredibly powerful. Don't just tell people what a product does; show them how* to use it to solve a specific problem. For example, if you're promoting a project management tool, create a "How to Set Up Your First Project in [Tool Name] in 10 Easy Steps" guide, complete with screenshots and video. These demonstrate expertise and build immense trust.

  • Comparisons & Vs. Articles: "Product A vs. Product B" articles are goldmines for commercial investigation intent. Provide an unbiased, detailed analysis of features, pricing, pros, and cons. Help your audience make an informed decision. Don't be afraid to highlight weaknesses of a product; it actually builds credibility.

  • Ultimate Guides: These are comprehensive, long-form pieces (2,000-5,000+ words) that cover every aspect of a broad topic within your niche. For instance, "The Ultimate Guide to Starting a Vegan Diet for Beginners." Within these guides, you can naturally weave in recommendations for relevant affiliate products (cookbooks, blenders, supplements). They establish you as an undeniable authority.

Listicles (e.g., "Best X for Y"): While often shorter, these can still be high-value if done right. Instead of just listing products, explain why* each product made the list, who it's best for, and provide specific use cases. "7 Best Budget Microphones for Podcasters" is more compelling than just "Best Microphones."
  • Problem/Solution Articles: Focus entirely on a specific pain point your audience faces and present affiliate products as the solution. "Tired of Bloating? These 5 Supplements Might Help" directly addresses a problem and offers solutions.

  • Case Studies/Personal Experience Articles: Share your own journey or the journey of someone who used an affiliate product to achieve a specific result. "How I Lost 15 Pounds in 3 Months Using [Diet Program]" is incredibly persuasive because it shows real-world application and results.


The key to high-value content is depth, clarity, and genuine helpfulness. Use clear headings, bullet points, and images to make it scannable and engaging. Don't just regurgitate information; add your own insights, experiences, and opinions. This personal touch is what makes your content unique and fosters a connection with your readers. Remember, you're not just selling; you're educating, guiding, and empowering your audience to make the best decisions for themselves.

3.3. SEO Best Practices for Affiliate Content

Creating high-value content is only half the battle; the other half is making sure people can actually find it. This is where Search Engine Optimization (SEO) comes into play. For affiliate marketers, SEO isn't just a technical chore; it's a strategic imperative that drives free, targeted traffic to your offers, day after day, month after month. Mastering SEO means understanding how search engines like Google work and optimizing your content to rank high in search results. It’s a long-term game, but the rewards are immense.

Let’s start with On-Page SEO essentials. This refers to all the optimizations you make directly on your web pages.

Keyword Integration: Your target keyword (the phrase people search for) should be naturally integrated into your content. This means in your title tag (the main title that appears in search results), your H1 heading (the main title on your page), in your subheadings (H2, H3), within the first paragraph, and sprinkled throughout the body text. Naturally* is the key word here – avoid "keyword stuffing," which is just repeating the keyword unnaturally and will hurt your rankings. Focus on semantic SEO, using related keywords and phrases that demonstrate a comprehensive understanding of the topic.

  • Meta Descriptions: While not a direct ranking factor, a compelling meta description (the short blurb under your title in search results) is crucial for