Alt text is what a screen reader announces and what image search indexes. On a generated page it is also usually generated — which means it is either written once properly or missing on every page at once.
The finding reads:
info img-no-alt … image(s) without alt textAdd alt text to the images.
Collapsed when it fires template-wide. If it appears on 90% or more of the pages — or of one language version — of a site with at least 20 pages, it is a property of the template and is reported once, with the count, instead of once per page.
pipx install indexgap
cd your-project
indexgap init
indexgap checkThen indexgap brief turns
every finding on this page into a work order in indexgap-briefs/,
with the thresholds the result has to satisfy and the command to check it.