Beerus is a God of Destruction in the Dragon Ball series. His main job is literally blowing up planets. He had a dream that he would fight someone called a Super Saiyan God. After a few shenanigans Goku turnes into a SsjG and they fight over the fate of the Earth. He won which means that the Earth will be destroyed. He won the fight but before he could he fell asleep due to him being exhausted. He later wants his master Whis to train Goku and Vegeta to be able to fight against him better later on because he's bored and has nothing else to do. Later on it is shown that Goku has a method to beat him using the power up Kaiōken on top of the transformation Super Saiyan God Super Saiyan(Basically Super Saiyan God mastered)
> Fam, Beerus can fuck yo ass up!