I mean, what else was it going to be for!?
Could have been for absolutely bloody anything - if you are at the other end of the ground I didn't have a clue what was going on. If you watch on tv then it's fine - we all know var is to please the tv viewers and screw the fans at the ground. Found on Twitter what it was for. Var is a truly awful invention made 100 times worse by being implemented by utter morons.