There are the following reasons: 1, the software installed in your mobile phone has plug-ins, and there are some unnecessary things in the software, such as pushing advertisements. I suggest you use 360 to do a physical examination on your mobile phone to see if there is anything wrong with the software in it. You must uninstall the problematic software and delete the file source.
2. Download the software to formal, green and beautiful official website, such as Sky Software and Huajun Software.
3. Don't browse and click on bad and vulgar websites and webpages. It is best to install mobile phone monitoring software, such as mobile phone guardian, 360, mobile phone housekeeper, etc. And do a physical examination on the mobile phone every once in a while to detect whether there are junk files and junk software on the mobile phone. I suggest you uninstall the game software one by one to see if the advertisements are still there. If the advertisement disappears after you download a certain software, it means that this is a plug-in advertisement that comes with the software. Delete him completely.
I personally hammered out all the above words, and forgot to adopt them.
Personal opinion, for reference only.
I sincerely hope that you can adopt it and help you. I look forward to your compliment. Thank you!