Why does a tab open when I unlock my smartphone?

[AC Question]

Tab opens when I unlock my smartphone

Hi there fellow android users.
I have an issue, when I unlock my smartphone a tab opens up showing an advertisement.
Is this some type of virus?
Or is it a file that is not a virus but can be deleted?

Hopefully you guys can answer this.
Kind regards.

 

[B. Diddy]

Welcome to Android Central! Which phone? Is the ad in the lockscreen, or does it show up as a popup over the homescreen after unlocking?

Chances are it's some kind of adware. You may have to uninstall apps one by one until that behavior goes away.

 

[Shazaamxyz]

Welcome to Android Central! Which phone? Is the ad in the lockscreen, or does it show up as a popup over the homescreen after unlocking?

Chances are it's some kind of adware. You may have to uninstall apps one by one until that behavior goes away.

And the pop up opens once I unlock my smartphone