I need to know about effect name?

[Bassem_110]

What is the name of the effect that lets me pass or move an object from the left screen to the right screen in the same video 

[Ann Bens]

Two screens in one frame is called Split Screen.

[Jeff Bugbee]

You looking for a Wipe?

[Ali Jaber]

You can use the "Crop" effect with some tweaking to "Motion" to do the trick. The important thing is to plan your shots before going to post production.