What Happened After The SEO Experiment
The April follow-up made the useful sequence much clearer: before the 14-page SEO test, during the test, and after the sitewide rollout to 834 exercise pages, the numbers kept moving in the same direction.
The SEO Experiment That Made Grammar Pages Rank 2x Faster
On February 27, 2026 I ran a controlled SEO enrichment test on 14 grammar exercise pages. By March 15 they were improving about twice as fast as the rest of the site, which was enough to roll the pattern out everywhere.