AI Overviews are Google's AI-generated answer blocks that appear at the top of search results. A synthesised response, assembled from multiple sources and citing them, instead of (or above) the familiar list of links.
They matter because they sit on the highest-traffic surface in search: for many queries, the Overview is the first thing a user reads, and often all they read. That compresses the classic "ten blue links" into one answer naming a few sources and brands, and shifts the goal from ranking a link to being cited inside the Overview.
Crucially, Overviews lean heavily on Google's existing search index and ranking signals, so strong classic SEO authority carries over here more than it does on some other AI surfaces. That makes them a bridge: the structured, authoritative content that earns featured snippets and good rankings also tends to earn Overview citations. Related: Google's conversational AI Mode takes this further into a full chat experience.