Dispatches · Algorithm
Algorithm research
Field reports on Amazon's A10 ranking algorithm — signal weights, behavioral predictors, and the tactics that adjust to each shift.
Amazon's A10 just got rewritten. Here's what 17,932 listings told us.
Amazon shipped a quiet A10 update sometime in early May. We measured the damage (and the openings) across 17,932 listings, and the story isn't what most consultants are telling you.
Stop writing 200-character Amazon titles. We measured 9,184 listings and the sweet spot is way shorter.
The 200-character ceiling is no longer the optimal target. We measured CTR, CVR, and rank for 9,184 listings across three length buckets. Here's where the sweet spot actually lives.
Does PPC actually move organic rank? A 7,418-listing natural experiment.
Amazon says no. Most sellers act like yes. We ran the experiment that settles it. The short answer: PPC works for organic, but only if your listing is already converting.
We ran 540 Amazon bullet A/B tests. Outcome-led bullets beat feature bullets by 2.1×.
Bullet copy is the most-rewritten and least-measured part of an Amazon listing. We ran 540 controlled bullet swaps across nine subcategories. The patterns that won, the patterns that lost, and a template you can steal.