Working with SEO

So my new job involves working with SEO friendly websites.

I am just wondering if anyone has any tips as to how I would find out how SEO friendly a certain website is?

I know that the likes of BBC, Bloomberg, WSJ, etc are all very good for SEO purposes.

But what other things should I look out for?

You can use tools such as SEO Site Checkup, Semrush, or Raven Tools Review.

For WordPress, I use Yoast SEO to guide me. It checks on keywords usage, images, links, etc.

SEO is the process that organizations go through to help make sure that their site ranks high in the search engines for relevant keywords and phrases.