Pillarbase study: 15.7 million AI Mode citations show what Google reuses

Pillarbase analyzed 15.7 million Google AI Mode citations across 148 industries over a year, per a study published via Search Engine Land. Most passages (80.9%) were cited only once, but roughly 2,300 passages were reused 61 or more times — the top one across 483 distinct queries — and those repeat passages skew short (117 words median), answer-first, and self-contained. Pages that already rank #1 organically accounted for 76% of the passages reused 100+ times.