I have a galaxy s6 and I am getting things like this pretty often now. When I go to text it will pop up or anything as well as Google play store pops up at random times. Is anyone else having this problem and what can I do to stop it?
Sounds like you've downloaded a rogue app - check out this post (it concerns an S4, but still applies) :
Android Forums at AndroidCentral.com
I've install the lookout app and it still does it.