IV's ???

I just started playing and I see so many people talking about IV's and I was wondering what they are and how do you find out what your Pokemons IV is

 

you need to go to the pokecenter at spawn and on the right there a professor looking person who tells you your pokemon's IVs for 500 coins
you can read up on IVs here http://bulbapedia.bulbagarden.net/wiki/Individual_values