AI Overviews are an AI summary above classic Google results on a normal search. AI Mode is a separate chat destination for follow-up questions. Same engine, different surfaces.
They sound the same, they're not. Both run on Gemini, both cite a small set of sources, both end many searches with no click. After that the resemblance stops. A SISTRIX study presented around Google I/O 2026 found only about 14% of cited URLs were shared between the two surfaces. Ranking in one does not buy a place in the other.
Interface. An AI Overview is a strip of generated text pinned above the ten blue links on a normal Google search, with a handful of citations beside or beneath it. The user types one query, reads one answer, and either clicks a link or doesn't. AI Mode is a full chat interface, a separate tab inside Google Search where a conversation can run across many turns, accept images and follow-up questions, and hold persistent context. One is a panel on a results page, the other is a destination.
Intent. AI Overviews catch short, factual queries where one paragraph is enough, the kind that used to trigger a featured snippet. AI Mode catches research threads, the multi-part question someone would once have spread across half a dozen tabs. The same person on the same topic uses both, but for different jobs.
Optimisation. Winning an AI citation in an Overview is about extractable claims: one clear sentence answering the query near the top of the page, clean structure, consistent entity signals, exactly the work Google Search Central documents for AI features. Winning a citation in AI Mode is about depth across a topic, internal linking, and authority signals that hold up across follow-up questions in the same conversation. The page that earns one is built differently from the page that earns the other.
This is where Australian SMBs miss. A Melbourne accountant might rank page one on classic search and earn three AI Overview citations on "small business tax return Australia", and zero AI Mode citations on a research thread like "how to structure a consulting business and what to claim". Same domain, two different surfaces. Treat them as one thing and you optimise for neither, which is the work SEO & AI Visibility and AI search optimisation exist to fix.