I've clicked on it and nothing happens. It just keeps wagging back and forth. I thought that perhaps it pertained to phone shops, but the number on the bell doesn't seem to have anything to do with how many phone shops are available when I search. So, what's it for?

I was wondering the same thing. When I click on it, it spins for quite a while and then takes me to the announcement page. The number doesn't seem to have anything to do with the announcements either.

Those are your "Alerts." In the app you can access them in the tab by the same title with a picture of a megaphone on it. I have noticed that they load slower on a PC than they do in the app but deleting in bulk is easier on the computer than the app. So maybe read them in app and clear the ones you don't want to keep next time you log in on the computer.

Where do you find the alerts on the computer? I would love to delete those in bulk.