Purchased LG Stylus 2 Plus 10 days back. Have got frustated with annoying pop up ads by android. Have started hating Google Play store due to these ads..
Here are some ways you can block ads:
For NON-ROOTED devices: Download APK Editor from the Play Store(Pro version lets you do more). You can use apk editor to remove ad strings and more.
For ROOTED devices: If your device is rooted, you can use an app called "Adaway". This app modifies a file in your system which is known as the "hosts" file.
With root, you are more likely to block all the ads.
I hope this helps!