The are a number of Windows settings for turning off what it calls "suggestions". Do a search in the Settings app for "suggest", click "Show all results" and see what comes up. Amongst them are:
* Show suggestions occasionally in Start
* Show suggestions in your timeline
* Suggest ways I can finish setting up my device to get the most out of Windows
* Get tips, tricks and suggestions as you use Windows
* Turn off suggested content in the Settings app
Changing these settings can greatly reduce Windows 10 spam.
* Show suggestions occasionally in Start
* Show suggestions in your timeline
* Suggest ways I can finish setting up my device to get the most out of Windows
* Get tips, tricks and suggestions as you use Windows
* Turn off suggested content in the Settings app
Changing these settings can greatly reduce Windows 10 spam.