Everyone claiming that they have some sort app causing the pop ups, or a virus, or anything else causing it, you are wrong. I have been experiencing these popups since buying my new LG V30 just a few days ago. These intrusive popups are straight from Google Play. On my phone, you have to go to settings, general, Google, ads, then select "opt out of personlized ads". Only problem is that it does not stop all the ads, just the personalized ones, and it even tells you that when you select to opt out. It is total bullcrap. I just had one of the bubbles pop up, I ignored it, then a full screen pop up appeared, which I had to hit the X to make it go away. There is no way to actually get rid of them with updated OS's from what I have found so far.