The ads you are getting are actually VPS updates from avast!..

However there is a bug of where it displays the ads INSTEAD of the VPS notification.

Gradually it is getting fixed.

If you use the notification solution… it will stop the ads which you are currently seeing and when the ads bug is fixed you can re-enable to the see the VPS ads.

If you want to disable software updater notifications (things such as adobe) you can do that through avast UI > Settings > Tools > Software Updater > Customize > (customize to your needs)… you can deselect the notifications or even disable it from there.