What happens when you save in gta v story mode?

The verified evidence focuses exclusively on Trevor Philips, a playable protagonist in Grand Theft Auto V's story mode. It describes his character background, role as leader of Trevor Philips Enterprises, and his conflict with rival criminal organizations in Blaine County, San Andreas. However, the evidence contains no information about what happens when players save their progress in GTA V story mode, such as automatic checkpoint saves, manual save options, or how the game preserves player progress between sessions.