Alt text describes an image for anyone who can't see it — screen reader users, and search engine crawlers that can't visually interpret images at all — meaning a missing alt attribute both excludes real users and gives Google zero information about what that image actually shows.
Alt text describes images to screen readers and to Google Images, which is a real source of traffic. Missing alt text forfeits image search visibility and hurts accessibility.
Every meaningful image has specific, descriptive alt text; purely decorative images use an empty alt attribute.
Fix it, then re-scan — the check confirms itself. No manual checkbox, the scan is the truth.
Run this check in H.I.V.E. →