Dragon Ball's Super Saiyan transformation is monumental, as Goku's transformation set off a chain reaction of expanding on the power's limits at the time. Vegeta became the third Saiyan we'd see achieve the power of a Super Saiyan, and his skill and power would only skyrocket. However, during the Cell Saga, Vegeta introduces the different grades of Super Saiyan one can achieve, becoming stronger by a few more levels and exhibiting a lot of strength in the process. This showed a different stage and advanced form of the transformation important to Dragon Ball.