Improving SEO

I just ran my new site https://best-food.info/ at https://www.woorank.com/

And am not sure if any of the following can be changed or if they need to be on WordPress.

robots.text I found this one on the web – https://pastie.org/8589601
Printability (I just added a plugin but it adds advertizing).
Dublin core
Speed tips
W3C
Deprecated html

I know about using keywords in the titles but I find doing it very restricting. Do you think it helps?

Happy New Year!

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