You may be have encountered this screen (or a version of it, as I think it has been revised a time or two):
Earlier today I got nagged with it, but instead of just saying “Skip for now” it said “Ask me again in 3 days” or something like that. That got me in a bit of a panic that this was somehow going to be something I had to deal with, and soon. The panic motivated me to search, and I think, based on what I found with Google, that Windows actually added a new setting to control this [mis] “feature”.
Hold Windows key and press I to open Settings.
In Settings, navigate to “System” and then under that “Notifications & actions”.
Look for a cluster options with checkboxes and find “Suggest ways I can finish setting up my device to get the most out of Windows”
Disable (uncheck) this option and the notification should not show up again.