I have been getting these little circle ads that pop up and stick on the home screen or whatever app I am in. I didn't think to get a screen shot but I will next time it pops up, I am using Chrome. I haven't installed any different apps than I normally use
Once you click on the ad, and then go into multitask view, what is the ad labeled as? It may tell you the app. You can uninstall, or just disable notifications/permissions.
You only really see this with the worst of apps. I have seen it once since Android was first released. It was a a crappy app.
Once you click on the ad, and then go into multitask view, what is the ad labeled as? It may tell you the app. You can uninstall, or just disable notifications/permissions.