Original researchUpdated

What Google AI Overviews cite for SEO queries: a 170-query study

Across 170 live US Google searches for SEO, AEO, and AI search topics in October 2026, every results page carried an AI Overview element, and we captured cited sources for 142. A typical Overview cited 7 distinct domains. YouTube was cited in 103 of those 142 Overviews, ahead of Semrush (48), Reddit (34), and Ahrefs (23). Only about a third of cited domains also ranked in that query's organic top ten.

We pulled live Google results for the 170 queries behind this site's content plan and recorded every source Google's AI Overview linked to. This page reports what we found, how we measured it, and what it means for anyone trying to be cited. The raw dataset is summarised in the tables below.

By , Founder, SerionFlow

What we measured ·

Study data: AI Overview citations across 170 SEO queries

Method: Live Google results (United States, desktop, English) for 170 SEO, AEO, and AI search queries, retrieved through DataForSEO's SERP API on 22 October 2026 (UTC). We extracted every reference URL attached to the AI Overview element and classified page types with our own rules.

All 170 results pages included an AI Overview element; 28 loaded asynchronously without capturable sources, leaving 142 Overviews with a median of 7 distinct cited domains.

YouTube was the single most cited domain, appearing in 103 of the 142 Overviews, followed by Semrush in 48, Reddit in 34, Ahrefs in 23, and Google's developer documentation in 21.

On average only 34 percent of the domains an Overview cited also ranked in the same query's organic top ten, so citation and ranking overlap less than many assume.

Most cited domains in 142 AI Overviews, October 2026
DomainOverviews citing itShare
youtube.com10373%
semrush.com4834%
reddit.com3424%
ahrefs.com2316%
developers.google.com2115%
linkedin.com1511%
01

Why we ran this study

Advice about getting cited in AI Overviews is usually based on anecdotes or vendor claims. We already had live results pages for the 170 queries we were planning content for, so we measured the sources directly. The query set is not a random sample of all searches: it is weighted toward SEO, AI search, technical SEO, and SaaS tooling, which is the space we work in. Treat the results as a picture of that niche, not of Google overall.

02

What kinds of pages Overviews cite

We classified all 1,154 captured references by page type.

AI Overview references by page type
Page typeReferencesShare
Guide or explainer40135%
Product or service page21719%
Video19517%
Free tool12711%
List or comparison1079%
Forum or community thread535%
Official documentation444%
Encyclopedia101%
03

Video is heavily cited, even for text questions

The most surprising result was YouTube's share. Overviews for queries such as how to fix Search Console statuses or how to set up robots.txt frequently linked a YouTube video alongside written guides. For brands, that suggests a short, accurate video walkthrough on an important topic can earn a citation that a written page alone may not. Product pages also appeared often, typically when the query named a tool category and the vendor page stated plainly what the product does.

04

Ranking and citation are related but distinct

Only about a third of cited domains also ranked in the organic top ten for the same query. Overviews draw on a wider pool, consistent with Google's description of AI features running additional searches for related sub-questions. A page that ranks eleventh, or ranks for a sub-question rather than the main query, can still be cited. Answering the specific sub-questions behind a topic in clear, self-contained sections is a practical response.

05

Coverage by topic family

Sources were captured for 18 of 19 Search Console queries, all 13 glossary queries, 25 of 28 AI SEO tool queries, and 21 of 26 AEO and GEO queries. Overviews for competitor alternatives queries were the most likely to load asynchronously without capturable sources, with sources captured for 5 of 8. Asynchronous Overviews still appear to searchers; we simply could not read their citations.

06

Limitations

This is one snapshot from one location and device. AI Overviews vary between searches, users, and days, so the same query can cite different sources later. Page-type classification uses rules on titles and URLs and will misclassify some pages. Domain counts are per Overview, so a domain cited three times in one Overview counts once. SerionFlow is not an AI Overview tracker; for ongoing monitoring of many queries, a dedicated SERP or AI visibility tool is the right choice.

Clear answers

Frequently asked questions

How many sources does a Google AI Overview cite?

+

In our sample of 142 Overviews for SEO queries, the median was 7 distinct domains, with an average of 7.1.

Do you need to rank in the top ten to be cited in an AI Overview?

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Not necessarily. In our sample, about two thirds of cited domains did not rank in the organic top ten for that query.

About the author

· Founder, SerionFlow

Shadrack builds SerionFlow's site research, page generation, and Search Console tooling, and runs the free tools these guides pair with. Search Console figures cited on these pages come from serionflow.com's own property.

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