5.1 Surround Sound is an audio system that creates an immersive listening experience by using six channels. The "5" refers to five speakers placed around the room: three in the front (left, center, right) and two in the back (left surround and right surround). The ".1" represents a subwoofer, which adds deep bass sounds, enhancing the overall audio quality. This setup is commonly used in home theaters and for watching movies, as it allows sound to come from different directions. This way, viewers can feel like they are part of the action, making it a popular choice for enjoying films and video games.