What is wrong with Galaxy J3 Prime?

[Android Central Question]

When I turn on my phone, a screen pops up. It has a notification button in the top right corner and my battery percentage a little above the center of the screen with the date and time right under it. It has 4 apps (Contacts, Chrome, Camera, and an animated circle that says "clean RAM".) And under that, it's always a Google ad. The background is my homescreen background picture. At the bottom of the screen it says "Slide to unlock" where it will then take my to my actual lock screen. What is it and how do I get it off??

 

[belodion]

See this: https://forums.androidcentral.com/showthread.php?t=901497