Missing H1
What it means
These indexable pages have no <h1>. The first heading tells both readers and search engines what the page is about, and screen reader users rely on it to orient themselves.
How to fix it
Add one <h1> naming the page's subject. It should agree with the title but need not be identical. The title is written for a search result, the H1 for someone already on the page. If the design has no visible heading, the page probably still needs one; style it rather than removing it.
Finding it in CrawlStat
After a crawl, open Issues and pick Missing H1. 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: h1_missing.