Blu-ray Discs are a type of optical disc designed for storing high-definition video and data. They can hold significantly more information than traditional DVDs, making them ideal for movies, video games, and other media that require high-quality visuals and sound. A standard Blu-ray Disc can store up to 25 GB of data on a single layer and 50 GB on a dual layer. The name "Blu-ray" comes from the blue laser used to read the disc, which allows for more precise data storage compared to the red laser used in DVDs. This technology has made Blu-ray a popular choice for home entertainment systems, providing viewers with an enhanced viewing experience.