CD burning is the process of writing data onto a compact disc (CD) using a computer. This involves transferring files, such as music or documents, from a computer's hard drive to a blank CD. The data is encoded onto the disc using a laser in a CD burner or DVD writer. Once the data is written, the CD can be used in various devices, such as CD players or computers. The process allows users to create backups, share files, or compile music playlists. However, with the rise of digital storage and streaming services, CD burning has become less common.