news pop-ups in lower right corner

Hi, I'm brand new to this forum. I would like to stop the news pop ups that come up in a gray box in the lower right hand corner of my laptop. I did find an answer that said the following "This is probably something you can suppress by disabling Settings -> System -> Notifications & actions -> Show app notifications (assuming that the culprit displays this as a standard Windows notification). But, of course, a better idea would be to figure out first what app is doing this." I followed this information and once I got into Notifications and Actions, now my question is which one(s) of the types of notification should I turn off. Or if you can tell me how to discover what app is doing this if it is an app. I have to close them constantly. TIA!