What is RAR and how do i change it to GBA

So I just down loaded a lot of game from this site, any ways I was wondering what is RAR and how do I change it GBA so I can play it in a GBA emulator?

Use WinRAR to extract the game to wherever you want.

thanks i just hope it's as easy as it sounds

It is. When you use WinRAR with the .rar file you will see after extraction it will then end in .gba

We have this very lovely tutorial these guys really should have linked you to.https://www.romulation.org/forum/index.php?topic=3880.0

well thanks but i figured it out

The GBA ROM is inside the RAR.
Install RAR to open it.