AI Overviews share of voice is your domain's share of the supporting links Google shows inside AI Overviews for a fixed query set — not a ChatGPT or Perplexity number, and not clicks. Google's AI features pull supporting pages from the Search index when an overview is shown; they do not publish a public share-of-voice API. You measure by recording, for each query, which domains appear as supporting links, then expressing your count as a percentage of all supporting links in that set. Keep that Google series separate from other engines. A high share is visibility in those overviews, not traffic or a citation guarantee.
What is AI Overviews share of voice?
AI Overviews share of voice is the percentage of supporting links in Google AI Overviews, for a query set you chose, that point at your domain versus everyone else you counted. It is the classic share-of-voice idea applied to one Google feature: the generated snapshot plus the links Google shows as backing.
Google describes AI Overviews as a Search feature that shows an AI-generated snapshot with links to dig deeper, and tells site owners that supporting links come from pages that are already eligible in Search. That is a different instrument from ChatGPT or Perplexity, which are not Google Search. Mixing those into one 'AI SOV' percentage hides which surface moved.
The number is only as honest as the query set. Vanity head terms can look busy while the questions that win work stay empty. Hold the set still if you want a trend.
- Unit: supporting links inside Google AI Overviews for a fixed query set.
- Not ChatGPT citations, not Perplexity sources, not organic blue-link rank.
- Not sessions, leads, or revenue.
- Google does not publish a public share-of-voice feed — you count what the overview shows.
How do you measure it?
Pick the questions a buyer would type. For each query, open Google Search in the locale you care about, note whether an AI Overview appeared, and record every supporting domain you can see. Your share is your domain's supporting-link count divided by all supporting links you recorded across the set.
Queries with no overview are a measured miss for this metric, not a reason to drop the row. Dropping them inflates the percentage. Log 'no overview' as its own outcome.
Repeat on a schedule with the same queries, locale, and counting rules. A one-off screenshot is a snapshot; a comparable series is the measurement. Our scan is a labelled snapshot across engines — if you use it for Google, keep the Google slice labelled as Google.
- 1Freeze a buyer-language query set and the competitors you will count against.
- 2For each query, record whether an AI Overview appeared and which domains were linked as support.
- 3Compute your domain's share of those supporting links; keep a separate count of queries with no overview.
- 4Do not fold ChatGPT or Perplexity rows into the same percentage.
What will this number not tell you?
Google has not published the exact rule for which retrieved pages become supporting links. Search Central's AI-features guidance is eligibility and quality practice — indexed, snippet-eligible pages that follow ordinary Search requirements — not a ranking formula you can reverse-engineer.
An overview can be wrong. Google's own help text says generative snapshots can include mistakes, and it points people at the linked sources. A supporting link is visibility in that snapshot, not proof the overview stated your claim correctly.
Share of voice here is not click-through. People can read the snapshot and never visit. Report the share as competitive visibility in AI Overviews, then measure traffic separately if you have it.
Frequently asked questions
Is AI Overviews share of voice the same as AI share of voice?+
It is one engine-feature slice. AI share of voice across ChatGPT, Perplexity, and Google should be reported as separate series, not one blended percentage. The complete guide on this site defines the broader metric.
Does Google give me this number in Search Console?+
Search Console can show AI-feature eligibility and traffic changes. It does not output a ready-made share-of-voice percentage of supporting links. You still have to count the overviews you care about, or use a labelled tool.
If my share rises, did I cause it?+
No. Google decides when an overview appears and which links support it. A rise is measured movement, not proof that a page you shipped caused it.