What Are Broken Links & Why Do They Hurt Your SEO?
A broken link — also called a dead link or 404 link — is a hyperlink that no longer leads to its intended destination. When a user or search engine bot follows a broken link, they receive an error response, most commonly a 404 Not Found or a server-level 5xx error. These errors silently erode your website's performance in ways that are easy to overlook but costly over time.
From an SEO perspective, broken links create several serious problems. Search engine crawlers like Googlebot follow links to discover and index content. When they encounter repeated dead ends, crawl budget is wasted, and signals of website quality drop. Internally broken links also interrupt the flow of PageRank — the authority passed between pages — meaning your carefully built link equity simply evaporates at broken endpoints.
Beyond search engines, broken links devastate user experience. A visitor who clicks a link expecting useful content and arrives at an error page is likely to leave your site entirely. High bounce rates stemming from 404 errors send negative engagement signals that compound your SEO losses over time.
Common causes of broken links include: deleted or moved pages without proper redirects, external websites changing their URL structure, domain name changes, typos in manually entered href attributes, and expiring third-party content. Images, CSS stylesheets, and JavaScript files can also "break" if their hosting paths change, causing layout and functionality failures invisible to basic link checks.
Fixing broken links involves three primary approaches: update the URL to the new correct address, set up a 301 permanent redirect from the old URL to the new destination, or remove the link if the resource is gone permanently. Using a reliable broken link checker tool regularly — ideally monthly for active websites — ensures you catch and resolve these issues before they impact your search rankings and user trust.