A technical SEO audit is a deep dive into a website’s structure to ensure search engines can properly crawl, index, and rank it. If your site has technical issues, no matter how good your content is, it won’t rank well. A technical SEO audit is a deep dive into a website’s structure to ensure search engines can properly crawl, index, and rank it. If your site has technical issues, no matter how good your content is, it won’t rank well.