A Blu-ray player is a device designed to play Blu-ray discs, which are high-definition optical discs used for storing video and audio. Unlike standard DVDs, Blu-ray discs can hold significantly more data, allowing for better picture quality and sound. Many Blu-ray players also support playback of regular DVDs and CDs, making them versatile for various media formats. In addition to playing physical discs, many modern Blu-ray players offer streaming capabilities, allowing users to access online services like Netflix and YouTube. This feature enhances the viewing experience by providing a wide range of content beyond just physical media.