Screenshot of Google's best practice tips for mobile-first indexing changes

Includes information pertaining to different website types and what they ought to do now that Google has rolled out “mobile-first” indexing.
Such as: your site is not going to be impacted if it is a) Desktop only b) Responsive Web Design or c) Canonical AMP
AND:
You need to make changes if your site type is a) Separate URLs b) Dynamic serving or c) AMP and non-AMP