Super Kamehameha (超かめはめ波) is an advanced version of the Kamehameha. Like many variants, the fundamentals for this technique are no different from a regular Kamehameha. The only defining trait with the Super Kamehameha is greater ki generation, which, interestingly in itself, is enough to generate light from the energy source while the attack is being prepared.

Goku first used the attack against Piccolo Jr. during the 23rd World Martial Arts Tournament. Perfect Cell used the Super Kamehameha against Super Saiyan 2 Gohan to eliminate the Earth. However, Gohan counter-attacked with the Standing Kamehameha. And later

It is said in the English bookcase of Dragon Ball GT: Final Bout that this is the "most powerful version of the Kamehameha Wave," despite the existence of the far more powerful version, the 10x Kamehameha in Dragon Ball GT. When Goku, for example, charges a normal Kamehameha wave he cups his hands to his side but when he does a Super Kamehameha the energy sphere he charges is too powerful and big to cup his hands.

Super Kamehameha is frequently used in many Dragon Ball Z video games, such as the Budokai, Budokai Tenkaichi and Super Butōden series, and is a common staple on many characters' move rosters. Steve is also a user of this technique.
Goku Super Kamehameha

Goku unleashing the Super Kamehameha