Broken link building starts with finding pages that link to content which no longer exists. These links lead visitors to error pages instead of helpful information. An affiliate marketer can create a useful article that replaces the missing content. After that the site owner is contacted with a polite message. The message explains the broken link and suggests the new resource. If the owner updates the page the affiliate site gains a backlink. Does broken link building still bring useful backlinks for affiliate sites today online in practice?