Microsoft seems to have recently increased the number of Edge/Bing popups making "recommendations" about how to use Edge -- "do this", "do that", "try this", "try that".
If you, like me, prefer to use Edge as a working environment rather than as a billboard for Microsoft features, you can turn off recommendations by changing a flag:
Type edge://flags in the address bar and press enter
Type Show feature and workflow recommendations in the search bar on top
Click on the dropdown menu beside the option and select Disable
You will probably have to do this on all your Windows 10 computers, each individually. I am not sure whether or not the flag change will disable Microsoft's notifications about setting Edge as the default browser (if it is not) or Bing as the default search engine (if it is not), but the flag change will cut down on the splatter of other "recommendations".
Microsoft, where is the option to get rid of this BS via a GPO? I swear, every version has some garbage I need to turn off. I still have not switched my enterprise to Edge from Chrome and things like this do not help.