He quickly revealed himself to be the half-Saiyan, half-human son of Vegeta and Bulma from a dark, alternate future. His mission was to travel back in time to warn Goku about the impending threat of the androids, a storyline that created the complex time-travel paradox that drives the Cell/Android saga. The manga provided a deep backstory for this version of Trunks, who is officially referred to as "Future Trunks" to distinguish him from his present-timeline counterpart.
While the anime established his story, the video game industry allowed players to fully engage with Trunks’ unique abilities and lore. He has become a staple of fighting games, role-playing games, and massive multiplayer online experiences. The Xenoverse and Heroes Franchises
For those wanting a deeper dive, these productions are considered mandatory viewing for fans: The History of Trunks (TV Special)