This is a link building technique that involves finding broken links on other sites that already exist, then contacting that website owner to fix the broken link by changing the destination to a relevant piece of content on your website.
Broken links can be the result of deleting a page, a redirect, a mistyped URL, or the script that was on the page was moved or deleted.
Broken link building is great for building domain authority, making new links, and establishing links naturally.
Broken link building is especially useful when you are looking to establish links quickly but can’t incorporate fresh content.