This video explains the recommendations found in the Readability tab of the Yoast SEO panel. This tab provides a detailed review of your content, along with customized suggestions to improve your chance of ranking in Google and other search engines. But it will also be a lot easier for your visitors to read.
Now, one thing to note about the Readability Analysis is that this does not proofread your post. It won’t point out grammatical or spelling errors. So, make sure you also give your post one final review, after you adjust these scores, to make sure everything looks good.