We train non-SEO staff to take control of their digital marketing (to manage their blogs and sites with organic SEO). And we offer PPC management, online reputation management and social media marketing training for advanced classes!
Use Google Scholar PDF or other authority content (in the body of your pages) to validate what you are presenting!
Set canonical tags.
Analyze your performance with Search Console tools.
Geo-target international content.
Ensure a connection between your H-tags and your chosen keywords in the URL of the page.
Ensure a connection between the words in the URL and the meta description tag and meta title tag.
Match the anchor tags with header tags. (Put in H2 your "keyword phrase" with an anchor tag that can be reached with a #keywordphrase jump). Details: https://html.com/anchors-links/
Check out securitytrails.com for domain information.
Examine which pages (if any) are appearing as sitelinks.
Check your .htaccess file errors, redirects and, permalinks.
Set Alerts: Monitor your keywords and/or theme.
Check browser compatibility.
Review links to help visitors know what's at the destination page. Trust matters greatly for humans and robots.
Manage BAD inbound links! See how to submit to Google Search Console bad links in a plain text file.
Monitor your site worldwide with uptrends.com.
Ping your new content via pingomatic.com.
So this short (much more is needed) sample checklist ends. Note: There is no such a thing as a "one size fits all checklist for SEO").