I have a LG G3 Phone. I have a green minion icon on my screen that I cannot get rid of

[AC Question]

I have a LG G3 Phone. This week I noticed a green minion looking icon on my desktop to the right. When I click on the icon it gets bigger. When you move it to the bottom of the screen over what looks like a black hole graphic it shoots up like a rocket and performs an optimization. I never installed it and cannot figure out how to get rid of it?