Missing meta description
What it means
These indexable pages have no meta description. Search engines then write their own snippet from the page text, which is rarely the pitch you would have chosen.
How to fix it
Write 70 to 155 characters per page saying what the page offers and why to click. It is not a ranking factor, so write it for the reader, not for a keyword. Leave it off deliberately only where the page text genuinely makes a better snippet than anything you would write.
Finding it in CrawlStat
After a crawl, open Issues and pick Missing meta description. Click Show all in Pages to filter the Pages table to the affected pages, or Export affected to hand the list to whoever owns the fix. Audit ID: description_missing.