Discuss the functioning of DVDs.

DVD (Digital Versatile Disk) is an optical storage device resembling a compact disc but with significantly greater capacity and faster data transfer. It can hold up to 17 GB of data. DVDs use a laser to read and store digital data as pits and lands on a reflective disc coated with a thin metal layer. These data patterns, representing 0s and 1s, are decoded to retrieve audio, video, or other information.