Google AI Overviews assembles answers from sources it already trusts: large 2026 citation studies put YouTube around 29.5% of Overviews, with Reddit close behind, alongside review platforms, niche category sites and clearly structured pages, and roughly 76% of cited pages also rank in the classic top 10.
Video is read as text: YouTube transcripts make it the single most cited domain inside Overviews. Community discussion on Reddit follows, then review platforms and the niche sites of each category, think Fragrantica for perfume or Tripadvisor for hotels, then press and brand pages that answer the question directly.
Overviews quote short, self-contained blocks. Pages that open with a 20 to 40 word direct answer under a question-style heading, keep claims specific with numbers, use a list or table where that is the honest shape, and show a fresh last-updated date get extracted far more often than long essays that bury the answer.
Winning an Overview is rarely one page. It is your direct-answer page plus a mention in a watched video plus real reviews plus community agreement. When those independent signals line up on one question, the Overview starts naming you, typically within two to three weeks of the sources being picked up.