Here we will show you a desciption of each Super Saiyan level, and since Goku has been to all of these levels we will just put a picture of him to show you what the form looks like!
Super Saiyan(level 1)
Super Saiyan is very powerful state, the Super Saiyan stage can only be released with intense rage. When in Super Saiyan stage a Saiyan's power, speed and agility will greatly increase, also a Saiyan's hair will spike up and turn blond color and the eyes will become green. There is a golden aura that surrounds a Super Saiyan. Saiyans who are half human/Saiyans can go super Saiyan at a much younger age. This is proved when Goten was able to go Super Saiyan at the age of seven
Here is a pic of Goku Super Saiyan level 1.
Super Saiyan(level2)
Super Saiyan 2 is an extremely powerful state, this level of Saiyan will do even more damage than Ultra, and without the lack in speed. Super Saiyan 2 looks a lot like Super Saiyan, except the hair grows a bit longer, and gets a bit more spikier. There is still a golden aura surrounding the Saiyan plus electric bolts will flash around whoever is in this form.
Here is a pic of Goku Super Saiyan level 2
Super Saiyan(level 2)
This form of SSJ takes a great deal of power to reach. There is a great jump in a Saiyan's power level when he is able to reach the third stage of Super Saiyan. The Saiyan will gain more power, agility, and speed than in Saiyan 2. Unlike Super Saiyan 1 and 2 the transformation into Super Saiyan 3 alters the body more, the eye brows will disappear and the hair of the Saiyan grows thick, full, and very long, all the way down to the waist.
Here is a pic of Goku Super Saiyan level 3
Yes, there is a Goku S.S. level 4, but since Dragonball GT was not created by Akira Toima(or however u spell it),I will not post the info on this site. Here is a pic anyway. He looks REAL GAY!