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/20210509220632/https://cdn.searchenginejournal.com/wp-content/uploads/2020/10/digital-advertising-is-not-the-next-internet-bubble-heres-why-5f899942b9cb4-276x244.png