Focused crawls are collections of frequently-updated webcrawl data from narrow (as opposed to broad or wide) web crawls, often focused on a single domain or subdomain.
The Wayback Machine - https://web.archive.org/web/20220110222619/https://docs.github.com/cn/github/writing-on-github/getting-started-with-writing-and-formatting-on-github/about-writing-and-formatting-on-github