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/20161013132539/https://abs.twimg.com/c/swift/en/bundle/boot.f3a5702af85bff5bb6febbc5fac0b8d65bfa7bff.js