With the incomplete technique, Goku creates a ki orb, splits it two and twirls them around his body.
With the complete version, the ki orbs are much larger.
Video Game Appearances
In Dragon Ball Heroes, it appears as Goku's Special Attack.
In World Mission, it is localized as Dancing Twin Dragon Blast where it appears as the Super Attack for God-like Saiyan Goku (Prison Planet Saga). It also has a Super Attack Accessory though it is called Twin Dragon Blast and its description refers to the technique as Supreme Dragon Blast but when the Accessory is equipped to a card, the technique is listed as Dancing Twin Dragon Blast in the card's Super Attack slot.
It is named in FighterZ as one of Goku (Ultra Instinct)'s Special Attacks, where circles them around himself with his hands, and then fires them simultaneously front and back.