A Blu-ray Disc is a high-capacity optical disc used for storing and playing back high-definition video and audio. It was developed to provide better quality than standard DVDs, allowing for sharper images and clearer sound. Blu-ray Discs can hold significantly more data, making them ideal for movies, video games, and other media that require high storage capacity. The technology behind Blu-ray uses a blue-violet laser, which has a shorter wavelength than the red laser used in DVDs. This allows for more data to be packed into the same physical space. As a result, Blu-ray players can deliver an enhanced viewing experience, making them popular among movie enthusiasts.