I got a really Noobish Question

[Nosta]

In the pathfinder Game
I will be in I will be playing a character who Trips his foes and knocks them prone
I have a feat that lets me count as large for tripping but I am not sure what all that dose for me
Can some one Enlighten me?

[ZeroSpace9000]

It will give you a +1 size bonus to your Combat Maneuver Bonus, or CMB, as well as Combat Maneuver Defence, or CMD.