if you highlite more then one song on the library, right click the mouse and press get info, a box will appear showing multiple song information.

can someone tells me what does that box near each row do?
because when i ticked it. on artist, album and artwork and pressing ok mostly all of my artists and albums where cleared away and i lost everything:( . i have also another software called mp3tag editor and even in there some of them are cleared. can someone please explain whats wrong? is it confliting with each other?

tnx alot guys