How do crawlers (Ahrefs, SEMRush etc) know what backlinks are pointing to my site?
Let's say I have SiteA and SiteB. SiteA is linking to SiteB. Can a crawler only crawl SiteB and know that SiteA is linking to it, or does it have to crawl both in order to establish this?
Let's say I have SiteA and SiteB. SiteA is linking to SiteB. Can a crawler only crawl SiteB and know that SiteA is linking to it, or does it have to crawl both in order to establish this?