Configuring Yoast in your WordPress dashboard. Here is some screenshot to Yoast SEO plugin for the client site is as given below;
When you install your yoast SEO plugin then you are configured that General, Search Appearance, Search console and social. Here is the screenshot of clients;
Then configure your permalink, the screenshot is as given below;
Content is a king on your website. I always manually check the content of client site. Here is the screenshot of client content;
When I look a content manually I am also looking Heading tags, Title tags, permalink, soiling and interlinking of that content. Here is the screenshot is given belows;
Soiling is a structuring the page to page post to post in the same category. If soiling will be the break that will be poor SEOing.
Interlinking is a great impact on SEO. Same category post interlinking with relevancy which indicates good SEO scoring.
keyword density of the content is a great issue for the Google ranking factor. It is one of the great ranking factors. You can use it 500 words in 1 times is a ratio. But it will change when Google change their rules.