Update 01 of 03
Coverage map shows when it was last crawled
A footer on the Coverage map shows the last crawl, the mapped domains and a Crawl button.
The footer reads "Last crawled …" or "Never crawled" and lists the domains included in the map. Click "Crawl" to start one from there, or use the ⋮ menu to open Crawl History, Allowed Domains or Reset Graph under Settings → Crawling.
More on this: exploratory testing and web testing.