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Windows 10, itself, wouldn't do that. Looks like you are subscribed to that blog or newsletter, however you got it. It could have come as a piggy-back subscription from something else you may have been on. Look at the bottom of it and find the "unsubscribe" link. Click that and follow instructions.
You can turn off News Notifications in Settings: Turn On or Off Notifications from Apps and Senders in Windows 10 | Windows 10 Tutorials