An image swap that doubled snippet CTR

An image swap that doubled snippet CTR
08:20 UTC — Confirmed by a DIY publisher. They already owned a list snippet for a "how to" query but CTR was weak. Google was pairing the snippet with a generic stock image scraped from elsewhere on the page. They added a clean, labeled step diagram directly inside the snippet-source section.
— Within ~10 days Google swapped to their diagram in the box
— Snippet CTR climbed from ~12% to ~24%
— No change in ranking position, pure CTR gain
Why it matters: We're hearing the snippet image is pulled from the source section, not always the page's hero. Put a relevant, labeled visual next to your liftable text and reportedly you can claim the thumbnail too. Watching this.