This is ultra its a add on to stage one you increase strength and power but not speed.
This is stage 2 Gohan was the first to reach it in the cell saga.Your hair sticks up a little more and you have electricity bolts around you.
This is stage Goku and gotenks reach this others might Your hair gets alot longer a lot changes beleive me. Goku was the first to reach this level vegeta skips this level
This is the final stage only vegeta (by cheating useing a pill bulma gives him} and goku reach this In GT. Your hair gets back to normal and you grow a tail and weird red hair. Before some even change intill to golden ozaroo.