The 'About' and bio depth experiment that moved less than expected

The question: how much does enriching About pages and author bios — the most-repeated EEAT advice — actually move rankings when tested in isolation?

A refreshingly negative case study, worth surfacing precisely because it underperformed. A B2B publisher added detailed author bios (credentials, sameAs links, photo, contact) to ~200 articles and rebuilt its About page with team, editorial policy, and physical address. Over four months: average position changed by ~0.4, inside normal volatility. No detectable lift.

This is consistent with what the QRG actually says: bios help a rater *find and verify* reputation that exists elsewhere. They do not manufacture reputation. If the off-site footprint is thin, a richer bio describes a thin entity in more words.

Counter-evidence: four months may be too short, and the bios could contribute to long-run trust calibration that this window did not capture.

Caveat: a null result from one publisher is not evidence of no effect generally — it is evidence that on this site, bios alone moved nothing measurable.

What we still don't know: whether bios act as a multiplier on existing authority (no authority to multiply, no effect) rather than an additive signal. This case is at least consistent with the multiplier reading.