Internet Marketing and AI blog

The impact of top‑of‑funnel content on bottom‑funnel engagement and conversions

tofu vs bofu

💡 Scroll to the bottom for a list of the sources referenced in this article.

You’ve probably been hearing a lot about "full-funnel" marketing lately, with different studies out pointing to user behavior changes in the LLM-driven search era. In digital marketing, Top-OF-Funnel (TOFU) content refers to all that educational, awareness-stage material – blog posts, how-to guides, and videos – that attracts potential customers.

Bottom-OF-Funnel (BOFU) is where the action is: the later stages where prospects are comparing options, evaluating pricing, or ready to convert.

A key question for marketers is: How much do those early TOFU touchpoints (where you might not even get a click) actually influence later BOFU behaviors and conversions?

Let's cut through the noise. Recent research – both academic and industry – overwhelmingly indicates that strong TOFU content plays a crucial role. It builds the brand awareness, trust, and recall that, in turn, boosts engagement and conversion at the bottom of the funnel.

Below, we’ll summarize findings that demonstrate this relationship, and also discuss how emerging generative AI engines are changing this dynamic.

TOFU content builds brand awareness, trust, and recall

Top-of-funnel content is fundamentally about brand exposure and credibility-building.

By providing valuable information with no immediate sales pitch, brands earn the attention and confidence of potential buyers early on. Multiple studies show this translates into measurable downstream benefits:

All of these findings reinforce a key point: TOFU content builds the foundation of trust, credibility, and brand recall that makes later conversion possible.

Influence of TOFU content on BOFU engagement & conversion

Okay, so TOFU makes people like your brand. But does it make them buy?

Yes. Early-funnel content doesn’t just make people like your brand – it ultimately encourages them to take bottom-funnel actions. Several studies have attempted to quantify the downstream impact:

How generative AI is changing the TOFU–BOFU landscape

Now, I know what you're thinking. "This is all great, but AI is eating TOFU for lunch."

And you're not wrong. The rise of generative AI tools (like OpenAI’s ChatGPT and Google’s AI-generated search summaries) is disrupting this entire funnel, especially at the top.

We're all seeing this in our analytics. A 2025 study by content agency Siege Media analyzed 7.2 million blog sessions and the data revealed an “accelerating shift toward bottom-of-funnel (BOFU) content,” potentially driven by AI-assisted search behavior.

High-intent content like pricing pages and product comparisons now make up a greater share of organic traffic, while generic educational content is drawing less traffic.

How bad is it?

Classic TOFU formats – general guides and how-to posts – saw the steepest declines. In absolute terms, guide-style content traffic fell ~35% and “How to” content traffic plummeted by an alarming 88% over two years. Meanwhile, pricing-related articles shot up (+12.1% traffic share).

This dramatic downturn is attributed to the rise of AI search tools, which are now “increasingly answering the broad, top-of-funnel questions.” But remember, in that process they are displaying and referencing the brands providing them with the information they're using to generate the answer.

Even HubSpot – a pioneer in TOFU blogging – saw its blog traffic drop by ~70–75% after Google introduced AI summary answers in search. In Scrunch’s words, “AI-powered answers have started siphoning away the browsing traffic that once sustained publishers and brands.”

The upside? The traffic which does reach you is often highly qualified. As one report quipped, “users arrive at brand sites not to browse but to buy.” They may have outsourced the research phase to AI, but they noted who was referenced in the answer generation, and asked about them at the BOFU stage.

Generative AI is forcing marketers to rethink the role of TOFU content. This does not mean TOFU content is dead – rather, its format and purpose are evolving. Brands must ensure their foundational content still reaches the audience. Siege Media’s experts advise doubling down on depth and specificity: creating ultra-detailed guides and very specific long-tail content (the kind of nuanced information AI answers often lack). The goal is to provide unique expertise, data, and insight that adds value beyond a quick AI summary.

Buyer journey: From general queries to BOFU conversions

Think about your own buyer journey. You rarely start by searching for a brand name.

Marketing research consistently shows that buyer journeys start broad and gradually become more specific. TOFU content is what engages buyers during those early, exploratory searches.

The buyer’s path from awareness to conversion is paved with content.

Takeaways

So, what's the takeaway for those of us in the trenches?

Both academic studies and industry research concur that top-of-funnel content is a powerful driver of bottom-of-funnel success. It creates the essential awareness, knowledge, and trust without which later conversions would be scarce. It’s not just about attracting eyeballs – it’s about influencing minds, even in the era where that influence may come within the Google or ChatGPT interfaces, and not on your website. Yes, this is a nightmare for attribution and no - I haven't yet figured out a reliable workaround.

This pays off in the form of higher engagement, more leads, and ultimately more conversions – as evidenced by experiments (e.g., a 131% boost in purchase likelihood) and surveys (e.g., most buyers consume multiple content pieces).

It's tempting to cut the TOFU budget when attribution is hard. Smart marketers measure TOFU content not just by last-click attribution, but via multi-touch attribution, GEO visibility, and brand metrics. As Nielsen’s report put it, upper-funnel efforts might have a “delayed ROI,” but they “still contribute to short-term sales in addition to fostering a pipeline of future ones.”

Completely forgoing TOFU content is risky. You might see a short-term bump in efficiency, but over time you'll erode the brand equity and awareness needed to feed the funnel.

In the era of generative AI, the role of TOFU content is evolving but remains vital. AI may handle simple questions, yet it is brand-produced content that provides depth, context, and personality reference. Your brand, or your competitors'.

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