Broken link building is effective because it flips traditional link outreach on its head. Instead of asking for a favor, you're offering a solution to a genuine problem the site owner has. When you find a broken external link on a high-authority page and offer your content as a replacement, you're providing value in exchange for the link. The strategy works on three levels. First, you're targeting pages that already link out to resources in your niche, so topical relevance is built in. Second, broken links hurt user experience and can hurt SEO, so webmasters have incentive to fix them when notified. Third, your outreach has a hook beyond self-promotion, which dramatically increases response rates. At Ottawa SEO, we see 12-18% positive responses on broken link campaigns versus 2-4% on generic guest post pitches. The technical advantage is that you're often replacing links that already passed authority. If a page linked to a resource that's now dead, that page likely has editorial standards and a history of linking to quality content. You're not fighting to get on a page that never links out. You're stepping into a gap. The practical execution involves finding broken links on resource pages, competitor backlink profiles, or industry directories using tools like Ahrefs or Screaming Frog. You verify the link is actually broken, create or identify content on your site that genuinely replaces what was lost, then reach out with a short email that notifies them of the problem and suggests your replacement. The catch is scale. Broken link building is manual and time-intensive. You might find 200 broken links in a niche but only 30 where you have a legitimate replacement. Then you're looking at 3-5 actual placements from those 30 outreach emails. It's effective but not efficient at volume. We use it selectively for clients in competitive niches where earning even five high-authority links can move rankings, not as a primary link building method for everyone.