Window thingies at bottom of screen when I open Apple News

Can somebody help me understand the purpose of the windows that appear at the bottom of the screen when I open Apple News? Are they like tabs or folders? I didn’t create them so they must be automatically generated. They are distracting and I would love to delete them. As far as I can tell it is not referenced in the offical iPad user guide (https://support.apple.com/en-ca/guide/ipad/welcome/ipados). You can drag one up and create like a floating window and then delete that but they keep coming back!