Remove annoying sidebar

[Cate C]

An annoying sidebar has appeared on my Android phone. It is always on top no matter what app I'm using. If I swipe left on the sidebar it opens a screen with a whole list of silly clickbait websites.
Then if I hit the back button it has a pop up says do you want to leave fun now.

How do I get rid of this?

I have a Samsung A8

 

[belodion]

Welcome.

See this: https://forums.androidcentral.com/showthread.php?t=905951

 

[Cate C]

Thankyou - that thread helped

It was attached to Wonder Video app - have uninstalled this and the sidebar has gone.