This seems to be a very popular list in the SEO community, to me it looks like the perfect starting point for SEO.

Google’s Ranking Factors

You might already know that Google uses over 200 ranking factors in their algorithm…
But what the heck are they?
Well, you’re in for a treat because I’ve put together a complete list.
Some are proven.
Some are controversial.
Others are SEO nerd speculation.
But they’re all here.
And I recently updated this entire list for 2020

backlinko was a starting point for me at least.

To show an example:

21. Page Covers Topic In-Depth: There’s a known correlation between depth of topic coverage and Google rankings. Therefore, pages that cover every angle likely have an edge vs. pages that only cover a topic partially.