As a link-building tactic, broken link building is a white-hat, effective, scalable, content-focused link-building strategy that builds links through finding broken links, recreating that broken content, and helping webmasters replace broken links with your corrected link.
Broken link building may perhaps be the most effective, white-hat link-building strategy in years. In particular, broken link building is appealing because the success of the campaign is directly proportional to how much good you do for the web. You profit only if you create good content to replace lost or abandoned content that webmasters still want to link to. This is the type of strategy that marries so many of the competing interests of our industry: content vs. links, link earning vs link building, inbound vs. outbound, etc.