Data Tabs
Images tab
Image URL,alt text,dimensions,and missing alt.
Enable Crawl images
Turn on "Crawl images"before starting the crawl so the Images tab is populated.
Images tab columns
Image URL,source page,alt text,alt missing,size,dimensions. Filter by "alt missing"to fix accessibility and SEO.
Fix missing alt
Add descriptive alt text in your CMS or HTML. Re-crawl to confirm.