10 SEO Trends I’ve Seen Firsthand in 2026 (With Data)

I work at Ahrefs, one of the world's best-known SEO tools, which means I get to talk with and learn from SEOs every day. And spoiler: it is wild how much SEO has changed in the past year, and how much SEOs are now expected to change with it.

A brand new awareness and growth channel appeared in the form of AI search, and in most companies, it gets shoved into the SEO remit. There's a whole new technical infrastructure to understand, too: it's no longer enough to know how search engines work; you also have to know how AI search engines work.

Meanwhile, the classic SEO playbook of top-of-funnel informational content (as much as it pains me to admit) seems to work a little worse with every passing day. We are all in the experimental, throw-spaghetti-at-the-wall phase, trying to work out where the next era of compounding growth comes from.

These are some of the SEO trends I have watched shift over the past year. All of these trends are backed up by real Ahrefs data (to show these are genuine industry-wide trends, and not just something I'm imagining).

Contents

1. Query fan-out
2. AI Overviews & AI Mode
3. AI content
4. Search everywhere optimization
5. Semantic SEO & entity optimization
6. SEO agents & automated SEO
7. llms.txt
8. Self-promotional “best” listicles
9. The decline of information-only content (affiliate sites included)
10. Branded search & brand building

Query fan-out is essentially keyword research 2.0, adapted to the AI era. Searches for the term barely existed a year ago and are now up +2,550% year over year, and the concept matters because it changes what SEOs actually optimize for.

Here is how it works. When you give an AI search engine like ChatGPT a prompt, it does not run that prompt as a single query. Instead, it generates a spread of related searches, called fan-out queries, and uses those to pull relevant content from a search index.

You can see the fan-out queries for yourself in Ahrefs Brand Radar.

So a single question can quietly become a dozen searches behind the scenes, and the pages that get cited are the ones that answer those hidden queries. The same logic now shapes traditional ranking, too, because AI Mode sits on top of Google. If you want to show up, you need to rank for the head term and the fan-outs around it.

But there's little use chasing exact fan-out queries: they are probabilistic, and change with every generation, so optimizing for a specific one is potentially a waste of time. Better: build a topic cluster that covers the whole topic space instead. Which is to say: the winning move is good old-fashioned keyword clustering and topical coverage, but pointed at a new search experience.

Keyword	Value	Change
query fan out	450/mo	+2,550% YoY
query fanout	200/mo	new (2025)
google query fan out	100/mo	new (2025)
query fan out seo	150/mo	new (2025)

Further reading

What is Query Fan-Out? Understanding the Hidden Queries Driving AI Search

Why ChatGPT Cites One Page Over Another (Study of 1.4M Prompts)

Topical Authority: What It Is, How Google Measures It, and How to Build It

AI Overviews and AI Mode are the biggest change to how Google works in years.

The old ten blue links were already being chipped away by featured snippets, local packs, and other SERP features. Now Google is working hard to funnel people into its AI-powered experiences instead, and that changes the math for everyone who relies on search traffic.

AI Overviews already show up for a huge share of searches, and when they do, they keep people on the results page. Our latest study found that AI Overviews reduce clicks to the top-ranking page by 58%. For every 100 clicks a number-one result would historically earn, Google now keeps 58 of them. We re-ran the analysis across 300,000 keywords using December 2025 Search Console data, and the effect held all the way down the page: position 2 lost 51%, position 3 lost 46%, and so on.

Then there is AI Mode, the longer-form, conversational version that feels a lot more like ChatGPT than a traditional search. Different format, same outcome. Across both, the story is the same: there are fewer clicks available in the SERP, your blue link is harder to find, and users are far more likely to get their answer on the page itself and never visit your site.

This goes well beyond a dip in traffic. It changes the unit economics of SEO, because the clicks you used to count on are quietly being kept by Google.

Keyword	Value	Change
ai mode	881,000/mo	+17% YoY
ai overviews	5,600/mo	+17% YoY
ai overview optimization	900/mo	+625% YoY
ai overview tracking	2,100/mo	+594% YoY

Further reading

Update: AI Overviews Reduce Clicks by 58%

Google AI Overviews: All You Need to Know

How to Rank in AI Overviews: What Actually Works (Based on Data, Not Speculation)

SEOs are practical people. When there is a faster, more efficient way to do something, they find it. That is why AI content creation has become such a big part of the job.

For a long time, using AI meant a trade-off. You got worse content, and we all saw the 'mount AI' traffic graphs: a site spams a few months of thin AI content, climbs, then gets flattened by a Google update. But I think that trade-off has largely gone away.

There is now enough infrastructure around the models (agentic harnesses, tool calling, MCPs, the plumbing that lets a model reach out to real tools and data) to produce genuinely good content with AI. I have written a lot about how to do that well, in what content engineering is, and why AI content is not inherently bad for SEO.

The data shows the attitude shift. Interest in creating with AI has climbed steadily since 2021, while interest in detecting AI content has fallen since its 2023 peak. People are normalizing the behavior. It is becoming more acceptable to use AI to produce high-quality work, which makes sense when you remember that every Google property, Docs, Sheets, Gmail, now has AI text generation built in.

Using AI to write is no longer a dirty secret. It is just part of how information gets made and shared on the internet.

Keyword	Value	Change
ai writing	19,000/mo	+15% YoY
ai content detector	14,000/mo	+11% YoY
ai content creation	5,100/mo	+16% YoY
humanize ai content	600/mo	+18% YoY

Further reading

What Is Content Engineering, and How Do You Do It?

Is AI Content Bad for SEO? No, and It Never Will Be (7 Reasons)

How Does AI Get Its Information? Training Data, RAG, MCPs, and APIs Explained

As clicks from Google dry up, attention is fragmenting. People now research and buy across more places than ever: social media, YouTube, news aggregators, individual websites, and marketplaces. The single front door of Google search has turned into a dozen side doors.

SEOs have started chasing visibility on those other surfaces, and the data shows it. Searches for 'search everywhere optimization' are up 197% year over year, and the platform-specific terms are all climbing too: TikTok SEO, Amazon SEO, YouTube SEO. Each is small growth on its own. Added together, they point to a real change. The SEO job is simply harder now, because there are more surfaces to win and no single one guarantees the traffic it used to.

This matters for AI search as well.

Many of these platforms feed the visibility a brand has inside AI answers. If you want to show up more often in ChatGPT, optimizing for YouTube and Reddit visibility is part of the work, not a separate project from traditional search. Where you appear off Google now shapes whether you appear on it, and inside the AI tools sitting on top of it.

Keyword	Value	Change
search everywhere optimization	500/mo	+197% YoY
tiktok seo	1,600/mo	+14% YoY
amazon seo	2,700/mo	+5% YoY
youtube seo	3,300/mo	+4% YoY

Further reading

AI Chatbot Traffic: What It Is, and How to Get More

How to Rank on ChatGPT: What Actually Works (Based on Data)

Google Maps SEO: 5 Proven Strategies to Rank Higher

Technical SEO frameworks like semantic SEO and entity optimization sound are enjoying a resurgence because of AI search. In truth, they always mattered: semantics and entities have always been part of how Google works, but there wasn't much you had to do about them beyond solid traditional SEO. But AI search has changed that.

An LLM builds its understanding of your brand from how often you appear in its training data and the context you appear in. The words, entities, and phrases that show up alongside your brand shape what the model thinks you are and when it should recommend you.

For example, Ahrefs has years of old content out on the web, guest posts and mentions, that all describe us slightly differently. That is confusing for an LLM, because there is no clear consensus about what Ahrefs is or does when so many sources use different language.

A big part of modern SEO is making your entities consistent across the internet and paying attention to the semantic context your brand shows up in.

(And if that sounds kinda complicated, don't worry: we have deep-dive guides on semantic search and the knowledge graph if you want to go deeper.)

Keyword	Value	Change
semantic seo	2,800/mo	+13% YoY
topical authority	1,400/mo	+14% YoY
entity seo	700/mo	+15% YoY
semantic keywords	1,400/mo	+12% YoY

Further reading

Semantic Search Is the Only Search That Matters Now (For SEO and AI Visibility)

Google’s Knowledge Graph Explained: How It Influences SEO & AI Search

Topical Authority: What It Is, How Google Measures It, and How to Build It

With agentic AI models, it is now genuinely possible to automate real SEO work. Searches for SEO AI agents are up 285% year over year, and the reason is simple: the tools finally caught up to the hype.

If you're still stuck thinking of AI as a fany chatbot, here's something to consider: if you believe AI can refactor a 50,000-line codebase, why couldn't it write a blog post or fix a batch of internal links? The harder, more structured task is the one that is already being automated.

This goes double when you plug SEO data into the workflow. With something like the Ahrefs MCP or Agent A, you can bring world-class SEO data into your AI workflows and automate things that simply could not be automated before.

We just published a list of SEO automations built with Agent A. The short version: keyword research, content updating, internal linking, site auditing, and a long tail of rote processes are all fair game now. The work that used to eat your afternoon is increasingly something you can hand to an agent.

Keyword	Value	Change
seo ai agent	900/mo	+285% YoY
ai seo agent	600/mo	+171% YoY
seo automation	2,600/mo	+14% YoY
agentic seo	150/mo	emerging

Further reading

11 Ways to Automate SEO with Agent A

Automated SEO: What It Is and How It Works in 2026

AI Agents for SEO: What They Are, How They Work, and How to Build One

What Is Agentic AI? A Plain-English Guide

Every SEO knows the humble robots.txt file. Now, there's a new text file on the block, llms.txt, and searches for it are up 154% year over year. I am including it here because, surprise surprise, it's usually SEOs who get asked to implement it. But I want to be blunt about what the data says.

llms.txt is a proposed standard that no major AI search provider actually uses. As our research found, 28% of sites now publish an llms.txt file, and 97% of those files were never fetched at all in a given month. Of the small share that did get read, most of the requests came from bots that are not AI tools. Slackbot, the link-preview bot, fetched llms.txt files more often than PerplexityBot did. Google has said plainly that the file is not needed to appear in its generative AI features.

So at this point llms.txt delivers basically no benefit (and even carries a little risk, making it much easier for competitors crawl your sitemap). People like simple, concrete things they can do to influence mysterious processes like AI visibility, which is exactly why this one spread. If someone is pushing you to add one, send them this data. There are far better places to spend the hour.

Keyword	Value	Change
llms.txt	3,700/mo	+154% YoY
what is llms.txt	1,100/mo	+423% YoY
llm.txt	1,100/mo	+202% YoY
llms.txt generator	450/mo	+223% YoY

Further reading

We Analyzed 137K Sites: 97% of llms.txt Files Never Get Read

How Does AI Get Its Information? Training Data, RAG, MCPs, and APIs Explained

LLM Visibility: What It Is and How to Optimize for It

One of the most effective ways to influence AI search, and even traditional Google results, has been to publish 'best' listicles (like “The 10 best CRM tools”).

My colleague Glen Allsopp's research on 'best' lists found that of all the source types cited by ChatGPT and other AI search engines, this format was cited most often, showing up in 43.8% of ChatGPT's sources and 48.9% of AI Overviews.

It makes sense. A lot of queries are commercial, and listicles are inherently commercial. They are genuinely useful in the buying process, as long as they are honest and not biased. But SEOs are going to SEOs: plenty of companies abused this by ranking themselves number one in 'best' lists published on their own domain. In Glen's data, 67.6% of 'best software' SERPs featured a list where the author put themselves in the top spot.

Now the tactic may be waning. As Lily Ray has reported, recent Google updates have hit self-promotional listicles hard, especially in SaaS. It increasingly looks like Google may use these lists but credit the competitors named in them while disregarding the publisher's own self-placement on its own domain.

Worth knowing if you are leaning on this play: it may not be as effective as it was, and honestly, I hope it fades out.

Metric	Value	Change
“best” lists in ChatGPT sources	43.8%	of all page types
prominence in AI Overviews	48.9%	highest of any platform
SERPs where author self-ranks #1	67.6%	250 “best software” SERPs
recently updated lists	79.1%	updated in 2025

Further reading

New Research: We Analyzed 750 ChatGPT Responses. ‘Best’ Lists Dominated

Why Calling Yourself the Best Could Backfire (Lily Ray)

How to Rank on ChatGPT: What Actually Works (Based on Data)

The biggest macro trend I have seen in SEO is the decline of information-only websites, affiliate sites included. Google seems to have it out for sites whose whole job is to share information rather than sell a product or support a real business.

The reason is not mysterious. Once AI Overviews and AI Mode arrived, informational content became commoditized. Most informational queries can now be answered with an AI-generated response, so Google has little reason to send a click to a pure information blog.

You can see it in the traffic. When I analyzed a small basket of well-known information-only blogs, I found it now sits at roughly 28% of its peak organic traffic, down about 72%. A basket of affiliate sites tells the same story, down about 66% from its peak.

As the search traffic dried up, so did the enthusiasm: combined search demand for affiliate-marketing topics is back to around 41% of its 2023 high.

The throughline connects to everything above. Google increasingly wants to reward brands, the kind people search for by name and that do something beyond publishing information, because publishing information is the one thing AI now does very, very well.

If your site exists only to inform, you are competing directly with the answer engine, and that is a hard place to stand.

Keyword	Value	Change
info-blog traffic	10-site basket	~28% of peak (-72%)
affiliate-site traffic	11-site basket	~34% of peak (-66%)
affiliate marketing (cluster)	200,000/mo	~41% of 2023 peak
what is affiliate marketing	10,000/mo	-42% YoY

Further reading

What Is Content Decay? (And How to Fix It Before It Tanks Your Traffic)

Topical Authority: What It Is, How Google Measures It, and How to Build It

SEO’s 5 Stages of Grief (And How to Adapt to AI SEO)

Here is one of the clearest findings in modern SEO: the best predictor of a brand's visibility in AI search is how often that brand is mentioned around the web.

We analyzed 75,000 brands, and branded web mentions correlated with AI visibility at 0.66 to 0.71, with YouTube mentions edging even higher at around 0.74. The more your brand is talked about, in relevant contexts and across many places, the more likely it is to show up in ChatGPT, AI Mode, and AI Overviews.

This has revived a lot of interest in plain old brand building. It also lines up with traditional search. Branded search volume is very likely a signal Google uses, because whether real people search for your brand by name is a strong tell of whether a site is legitimate or just built for SEO. A site nobody searches for is easy to discount.

And this is the natural answer to the previous trend. If Google is pulling away from sites that only inform, the sites it still rewards are brands: businesses people seek out by name and that do something beyond publishing information.

So SEOs are increasingly trying to cultivate, grow, and protect their branded search. That means more than traditional SEO. It means brand marketing, advertising, investing in other formats, and generally doing the work to make your brand more visible across the internet.

Keyword	Value	Change
branded search	1,300/mo	+13% YoY
brand seo	600/mo	+12% YoY
branded keywords	1,000/mo	+8% YoY
brand awareness seo	200/mo	flat

Further reading

Top Brand Visibility Factors in ChatGPT, AI Mode, and AI Overviews (75k Brands Studied)

How to Rank on ChatGPT: What Actually Works (Based on Data)

How to Monitor Brand Mentions in ChatGPT

Post byRyan Law

Ryan Law is the Director of Content Marketing at Ahrefs. Before joining the team, Ryan was CMO at content marketing agency Animalz.

Over the past 13 years, Ryan has been a writer, content strategist, team lead, marketing director, VP, CMO, and agency co-founder. He's worked with companies including Google, Zapier, Textio, Clearbit, and Algolia and hosted workshops and webinars for many more.

Ryan is the creator of two fantasy novels, two writing courses, and many more (less successful) projects.