Your website might be the most beautiful in all the land, with content so rich it makes your competitors tremble in fear. That's great, but if the back end of your website runs like a 1985 Yugo, Google is likely to give your site the big thumbs down when it comes to organic search results based on their Summer 2021 core algorithm update.
But do not fret just yet. Google provides several tools that gives you everything (well, almost) you need to fix, and eventually prevent errors.