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/20200826234841/https://github.com/RocketChat/Rocket.Chat/commit/5e6c177f771887d30391fe5f6e9eebe326dc0986