How do I check if my website is optimized for SEO?

I want to find out if my website is optimized for SEO. Can you please tell me the easiest way to do this? What are some methods to find out this metric accurately and quickly? 

There are actually quite a few different simple methods for checking website optimization. For example, one of them is this on-page seo checker service - https://pr-cy.io/tools/content-analysis/. With its help, you can very quickly and easily analyze your site at any stage of its promotion and make the necessary conclusions for its further improvement.