Isekai is a genre of anime, manga, light novels, video games, and other media that centers on a protagonist who is transported/resurrected/summoned to and must survive in another world. Worlds such as a fantasy world, virtual world or parallel universe.
Isekai anime, manga, etc. in which a "Good for Nothing" person dies and is reborn in another world with "Godly Powers" and is tasked with saving the world, is currently trending. Here are several examples: Sword Art Online, That Time I Got Reincarnated as a Slime, Cautious Hero: The Hero is Overpowered but Overly Cautious, etc.