In this guide, we’ll cover what crawlability problems are, how they affect SEO, and how to fix them. Crawlability problems are issues that prevent search engines from accessing your website pages. Common crawlability problems include:Nofollow linksRedirect loopsBad site structureSlow site speedHow Do Crawlability Issues Affect SEO? But if your site has crawlability problems, some (or all) pages are practically invisible to search engines. Bad site site architecture can create crawlability issues.