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/20220526032624/https://imgcdn.cna.com.tw/www/webphotos/WebCover/420/20220525/847x635_151310588283.jpg