A game master (often abbreviated as GM) is a person who facilitates and oversees a tabletop role-playing game (RPG). They create the game world, develop the storyline, and control non-player characters (NPCs). The GM ensures that the game runs smoothly, interprets the rules, and helps players navigate challenges and adventures. In addition to managing the game, the GM acts as a storyteller, guiding players through their quests and responding to their decisions. This role is crucial in games like Dungeons & Dragons and other RPGs, where the GM's creativity and leadership shape the overall experience for the players.