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/20200718064452/https://imgcdn.cna.com.tw/www/webphotos/WebCover/800/20200718/902x676_990615312722.jpg