Sales Funnel – What Is It and How to Build One?

• where potential customers come from,
• why some of them don’t move on to the next stage,
• what to do to increase the number of conversions without increasing the budget.

In this article, we explain what a sales funnel is, how the ToFu–MoFu–BoFu model works, how a sales funnel differs from a marketing funnel, and how to build an effective funnel, step by step, tailored to real user behavior.

What is a sales funnel?

A sales funnel is a model describing the successive stages a potential customer goes through before making a purchase decision. Each stage corresponds to a different level of awareness, intent, and readiness to act, which is why it requires a different type of communication, content, and tools.

In practical terms, a sales funnel:

• organizes the user’s purchase journey from first contact with the brand to purchase,
• shows at which stage customers most often drop off,
• lets you match marketing activities to real behavior, not assumptions.

In an online environment, a sales funnel isn’t a single campaign or a single page. It’s an entire system of touchpoints – articles, ads, landing pages, forms,emails, remarketing, and sales offers that together guide the user to conversion.

It’s also important that the funnel doesn’t end at the moment of purchase. Increasingly, it also includes:

• post-purchase activities,
• customer retention,
• repeat purchases,
• referrals and upselling.

As a result, the sales funnel stops being just a customer acquisition tool and starts genuinely influencing long-term Customer Lifetime Value (CLV).

Why is it worth including a sales funnel in your marketing activities?

A sales funnel lets you connect marketing with sales and stop treating traffic, leads, and conversions as separate entities. Instead of focusing solely on the number of clicks or impressions, you start analyzing how users actually move through the purchase process.

The main benefits of working with a funnel:

• Better alignment of messaging with user intent. Different content works for people who are just discovering the topic than for those comparing offers or close to a decision.
• Easier identification of sales problems. The funnel shows whether the issue is traffic acquisition, lead conversion, or closing the sale.
• Lower Customer Acquisition Cost (CPA). Instead of increasing the budget, you optimize the specific stages that block progress.
• The ability to automate sensibly. The funnel enables implementing email sequences, remarketing, and lead scoring based on real user behavior.
• Better use of existing traffic. Even a small conversion improvement at one stage can significantly increase sales without acquiring new users.

The ToFu – MoFu – BoFu model

The ToFu–MoFu–BoFu model is a simple, practical way of dividing the sales funnel into three main stages, corresponding to different levels of the user’s readiness to buy. This makes it easier to match content, formats, and messaging to the real needs of your audience.

ToFu (Top of the Funnel) – top of the funnel

This is the stage of the user’s first contact with the brand. A person at the ToFu stage:

• is just identifying a problem or need,
• is looking for information, not an offer,
• isn’t ready for a purchase decision yet.

The goal at this stage is to build awareness and interest, not to sell. What matters is reaching the right people and encouraging them to complete a first micro-conversion, e.g. visiting the site, reading an article, or watching a video.

MoFu (Middle of the Funnel) – middle of the funnel

At the MoFu stage, the user:

• already knows the topic and is considering different solutions,
• compares offers, approaches, or providers,
• looks for arguments and confirmation that they’re choosing correctly.

Here, the key is building trust and providing specific information that helps with decision-making. This is the moment for in-depth content that demonstrates experience, results, and the real value of the offer.

BoFu (Bottom of the Funnel) – bottom of the funnel

BoFu is the stage directly preceding purchase. The user:

• has a clearly defined intent,
• needs one final push or risk reduction,
• expects clear terms and a simple process.

The goal at this stage is to close the conversion – through clear calls to action, a polished offer, social proof, and removing purchase barriers.

At this stage, companies analyze customer behavior on the website and use upselling and cross-selling techniques to increase order value. For example, Amazon generates as much as 35% of its revenue through cross-selling alone.

👉 Learn more: ToFu, MoFu, BoFu – how to match your activities to the funnel?

Stages of the sales funnel 

Although the sales funnel is often simplified to the ToFu–MoFu–BoFu model, in practice it consists of several stages that can be measured and optimized. Each corresponds to different user behavior and a different business goal.

Here are the individual stages:

1. Awareness

The user encounters the brand or topic for the first time. They might come across an article, an ad, a social media post, or a search result. At this stage, they:

• don’t know your offer yet,
• often don’t have a clearly defined need,
• consume informational or educational content.

At this stage, the user is just discovering the brand and the topic. If the content doesn’t answer their first question or hold their attention, the interaction ends very quickly with no follow-through. This shows up in the number of visits, time spent on the page, content scrolling, and bounce rate – if most people leave within a few seconds, the funnel has nothing left to work with.

2. Interest

The user starts exploring the topic and comes back for more information. They already know the problem exists and want to solve it.

At this stage, they:

• read more content,
• compare approaches or solutions,
• are open to more in-depth material.

The user starts coming back for more information and looking into the topic more deeply. This is the moment where you build the first engagement and show that it’s worth spending more time on you. Here it’s worth looking at returning users, pageviews per session, and first micro-actions such as sign-ups or clicks on further content.

3. Consideration

The user is genuinely considering a purchase or reaching out. They start comparing offers, checking details, and looking for confirmation.

This is the moment when:

• arguments and evidence matter,
• trust plays a growing role,
• the user expects specifics.

At the consideration stage, the user is already taking steps that genuinely bring them closer to a decision – downloading materials, reading comparisons, checking the offer, or leaving contact details. This is the moment where the number of leads, downloads, and visits to the offer page says more than traffic alone.

4. Decision

The user is close to converting. They have a defined intent and need a clear signal that they’re making the right choice.

 At this stage, what matters is:

• simplicity of the process,
• clear terms,
• risk reduction.

At the decision stage, what matters is how many users actually reach the final step (add a product to the cart, start checkout, or submit a form) and how many drop off along the way. Abandoned carts, unfinished forms, and drop-offs at the final steps clearly show where the problem lies.

5. Post-purchase activities and loyalty 

The funnel doesn’t end at the moment of the transaction. This is the stage of:

• customer retention,
• building loyalty,
• increasing cart value over time.

It’s after the sale that you can best see whether the funnel works in the long term. If customers come back, place further orders, or arrive through referrals, it means the process doesn’t end with a single transaction – it genuinely builds value over time.

How to build an effective sales funnel?

Here’s what’s worth doing:

1. Start with user intent, not with tools

The funnel doesn’t start in your email system or your CRM. It starts in the user’s head. Before you design anything, you need to know what problem brings them to the site and what they’re looking for at that stage. Someone who’s just discovering the topic behaves differently from someone comparing offers and close to a decision.

2. Organize your touchpoints

Check where users come from and what they do first. Traffic from informational articles, ad campaigns, or referrals behaves differently. Even at this stage, you can see which sources generate real interest and which just produce empty visits with no follow-through.

3. Match content to the stages

Every piece of content in the funnel should move the user one step further. Content at the top should hold attention and encourage further engagement. In the middle of the funnel, the user should get arguments, comparisons, and specifics. Close to the decision, content should make it easier to act, not distract with extra information.

4. Check whether users actually move forward

If someone reads articles but never reaches the offer, the funnel breaks off. If leads appear but there’s no sales, the problem lies in consideration or decision. Transitions between stages say more about the funnel’s effectiveness than the number of users alone.

5. Automate only once you know what works

Automation only makes sense when it responds to specific behaviors. Email sequences, remarketing, or reminders should stem from what the user actually did – not from the assumption that every lead needs the same thing.

6. Optimize one spot at a time

You don’t fix the whole funnel at once. You find the spot where the most people drop off (e.g. on the landing page, at the form, in the cart) and work only on that stage. Even a small improvement at one point often has a bigger effect than adding new campaigns.

Which tools are essential for automating the funnel?

Effectively automating an online sales funnel requires tools that streamline process management and increase the effectiveness of marketing activities. The key tools are marketing automation platforms, CRM systems, analytics tools, ad platforms, email marketing solutions, and social media.

• Marketing automation platforms – HubSpot, Marketo, or ActiveCampaign let you automate email campaigns, segment your audience, and analyze their on-site behavior, allowing you to deliver personalized content at the right moment and increase the chances of conversion.
• CRM systems – Salesforce or Zoho CRM help manage your customer base, track interactions, and monitor progress through the sales cycle. Integration with marketing platforms ensures smooth data exchange between teams.
• Analytics tools – GA4 lets you track conversion rates, identify weak points in the purchase process, and optimize individual stages of the funnel. A/B testing tools help check the effectiveness of different page or campaign elements.
• Ad platforms – Google Ads or Facebook Ads let you precisely target ads to specific audience groups, increasing the effectiveness of activities at the TOFU (Top of the Funnel) and MOFU (Middle of the Funnel) stages.
• Email marketing solutions – Mailchimp or Sendinblue let you automate email sequences, build relationships with potential customers, and send abandoned cart reminders.
• Social media – Instagram, LinkedIn, or TikTok work great for building brand awareness and generating leads through engaging content and remarketing campaigns.

Integrating all these tools creates a coherent system for managing an online sales funnel – from acquiring potential customers all the way to closing the transaction and post-purchase activities.

How to adapt the funnel to different business models?

Adapting an online sales funnel to different business models requires understanding the specifics of each. In a B2C (business to consumer) model, the process is usually shorter and more direct, since purchase decisions are made by individual customers. What matters here is fast marketing action, attractive promotions, and a simple, intuitive purchase journey. Remarketing campaigns targeted at people who abandoned their cart are a good example of effective tactics.

In a B2B (business to business) model, the sales process is more complex and requires building long-term relationships with multiple people within the organization. The funnel focuses on delivering valuable educational content such as:

• webinars – allow for interaction and showcasing expert knowledge,
• case studies – show the real benefits of implementing a product or service,
• industry reports – provide detailed analysis and market trends.

Personalizing communication and using CRM tools play a key role here.

Regardless of the business model, it’s important to match content to the customer journey stage:

• TOFU (Top of the Funnel) – in B2C, social media ad campaigns or short video formats work well, while in B2B, expert articles or market analyses are a better fit,
• MOFU (Middle of the Funnel) – for consumers, personalized emails with attractive offers can be effective, while in B2B it’s worth focusing on product presentations or individual online meetings.

Process automation is another key element of success. Tools such as HubSpot or Salesforce not only let you track customer behavior but, more importantly, deliver the right content to them at the optimal moment. This significantly increases the effectiveness of the sales funnel, regardless of whether we’re talking about B2C or B2B.

You can’t forget to regularly analyze data on conversion rates at every stage of the funnel and identify potential barriers in the purchase process. It’s precisely this information that lets companies continuously adjust their strategies and optimize the performance of their entire online sales system.

How to measure and optimize the effectiveness of a sales funnel?

Measuring and optimizing the effectiveness of an online sales funnel are key steps that can significantly boost your conversion rate and improve sales results. To effectively monitor its performance, it’s worth focusing on analyzing conversion metrics at every stage – from lead acquisition (TOFU) all the way to closing the transaction (BOFU).

Among the most important effectiveness metrics are:

• conversion rate – shows what percentage of users move from one funnel stage to the next,
• lead-to-customer rate – measures how many potential customers turn into paying ones,
• Customer Acquisition Cost (CPA) – shows how much you need to invest to acquire one customer. The lower the CPA, the more effective the activities,
• cart abandonment rate – indicates the percentage of users who added products to their cart but didn’t complete the purchase. It averages around 70%, which represents huge optimization potential.

Analyzing this data requires the right tools, such as GA4 or marketing automation platforms (e.g. HubSpot). They let you track user behavior in real time and identify friction points in the purchase process.

Optimizing a sales funnel is a continuous, data-driven process. Example actions include:

• simplifying site navigation – an intuitive structure shortens the time customers need to make a decision,
• testing calls to action (CTAs) – experimenting with different button texts and colors can increase click-through rates
• content personalization – tailoring messaging to your target audience’s preferences increases engagement and campaign effectiveness,
• remarketing – campaigns targeted at people who abandoned their cart or visited the site without buying can boost conversions at a lower cost.

Regularly monitoring and refining the sales funnel pays off in more transactions and, as a result, lower marketing costs. This ultimately leads to higher profitability and long-term revenue growth for companies.

What are the most common mistakes in building a sales funnel?

The most common mistakes in building an online sales funnel are:

• poor UX optimization – overly complicated navigation, slow page loading, or unfriendly sign-up forms can discourage customers right from the start,
• content mismatched to the funnel stages – presenting overly technical information at the TOFU (Top of the Funnel) stage can overwhelm users, while a lack of detailed data at the BOFU (Bottom of the Funnel) stage makes it harder to make a purchase decision,
• neglecting data analysis – without regularly monitoring key metrics such as conversion rate or the number of abandoned carts, it’s hard to spot weak points in the sales process,
• underusing marketing automation – automation tools can increase the number of conversions,
• neglecting post-purchase activities – retaining an existing customer can be up to five times cheaper than acquiring a new one, and loyalty programs or follow-up emails help build long-term relationships.

Avoiding these mistakes requires continuous data monitoring, testing different strategies, and flexibly adapting content and processes to the changing needs of the market and your target audience.

How to fix a funnel that isn’t working?

Fixing a broken online sales funnel requires data analysis, optimizing the purchase journey, and testing solutions. The key is identifying problems at individual stages of the process, such as a high cart abandonment rate or a low conversion rate. Tools like GA4 or HubSpot will help you pinpoint exactly where customers give up on their purchase.

• data analysis – review key metrics such as conversion rate, cart abandonment rate, and average order value,
• identifying barriers – check whether the problems stem from things like a complicated payment process or unclear delivery information,
• simplifying the purchase journey – add clear calls to action (CTAs) and improve site usability,
• optimizing content – tailor materials to the funnel stage – from educational content at the top (TOFU), through personalized emails at the MOFU stage, to detailed product descriptions and upselling techniques at the bottom (BOFU),
• testing solutions – run A/B tests to check the effectiveness of different page elements, such as headlines or CTA button colors,
• post-purchase activities – introduce loyalty programs and follow-up emails to stay in touch with customers and encourage them to come back.

Regular data analysis and flexibly adapting your strategy to changing market conditions are key to effectively managing an online sales funnel.

Sales funnel – FAQ

Does every business need a sales funnel?
Yes, if the sale doesn’t happen impulsively in one step. The more expensive the product or the longer the decision-making process, the more a well-structured funnel matters.

Does a sales funnel have to have exactly the ToFu, MoFu, and BoFu stages?
No. It’s a simplified model that helps organize your activities. In practice, a funnel can have more stages or look different, depending on the industry and how you sell.

How do you tell that a funnel isn’t working?

You can usually tell from high traffic with no further action, leads without sales, or a high number of abandoned carts or forms. It’s a signal that one of the stages is blocking progress.

Where should you start building a sales funnel?
With analyzing user behavior: where they come from, what they do first, and where they most often drop off. Only after that is it worth matching content, offers, and automation.

Is automation necessary for a funnel to work?
Not at first. A funnel can work manually or semi-automatically. Automation only makes sense once you know which elements actually move the user to the next stage.

How do you measure the effectiveness of a sales funnel?
Not with a single metric. What matters is whether users move between stages: whether they come back, leave their details, reach the offer, and ultimately buy. Drop-offs at specific transitions show what needs improvement.

Does the funnel end at the sale?
No. If a customer doesn’t come back and buy again, the funnel’s potential goes unused. Post-purchase activities are extremely important for long-term results.

Summary

An effective sales funnel isn’t just dry theory – it’s a practical tool that will work for your business, helping you better understand customer needs and deliver valuable content at the right time. Whether you want to attract new audiences (TOFU), build a relationship and trust with them (MOFU), or convince them to complete a purchase (BOFU) – every phase of the funnel requires a well-thought-out strategy. Incorporating these three stages into your marketing activities will help increase conversions and build a long-term customer relationship that pays off in loyalty and a higher Customer Lifetime Value (CLTV).