Saw a site with a presentation of all “levers” in the algorithm of the Google bot ; from what I remember, briefly among (there are others levers i don’t remember) the most important :
Structuration of pages : H1 titles, H2, H3, p, etc. In fact well respecting the edition standards (it must be consistent for the bots), with a little tips : optimising placement of pertinents Keywords in Hn titles (as bolding some pertinent words)
Content of Metas of course (careful not to reapeat to much same keywords between Tags and description, even more with body text as in code)
And less important as more “technical”
Keywords in code your Divs as Span as Classes names (better a “shopA-bakery-nameofcity” class for a container that treat about its presentation than a “container-blocX” class as eg)
Not SEO
Netlinking : Gbot “considers” thats a site that has links to it is logically a site that has interest (but also “underestand” when abuse with plenty empty shells with a negative evaluation then.
Updates : Gbot “considers” that frequently updates mean that the website is “serious” and not a ghost empty shell
By “pertinent” i mean : susceptible to be used by the “prospects” of the site in Google etc.