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/20150814092207/http://www.slate.com/content/dam/slate/articles/technology/bitwise/2015/07/150727_BIT_Rowhammer.jpg.CROP.promo-mediumlarge.jpg
