Sniffing out most of a website’s basic search-engine-optimization problems can be done in 20 minutes or less if you know what you’re doing. Here are the essentials for an effective and fast SEO audit. I’ll warn you now that reading this guide might take a bit more time than it does to actually perform the SEO audit itself. But by the time you finish reading, you will be fully prepared to improve a site’s visibility. Take good notes as you complete the audit; you’ll need them to prioritize optimization tasks.