A CD (Compact Disc) works by using a laser to read data encoded in the form of tiny pits on its surface, which represent digital information such as movies and pictures. The data is stored in a binary format, allowing it to be interpreted by a CD player or computer. Users are encouraged to consult existing diagrams and explanations for a clearer understanding, as forums may not provide the most efficient answers. Searching online can yield valuable resources for learning about CD technology. Overall, utilizing search engines is recommended for comprehensive information on how CDs function.