Optical storage refers to a method of storing data on discs that can be read by lasers. Common types of optical storage media include CDs, DVDs, and Blu-ray discs. These discs use pits and lands on their surface to represent binary data, which a laser reads to access the information. Optical storage is popular for its durability and portability. Unlike hard drives, optical discs are less susceptible to magnetic fields and physical shocks. They are often used for music, movies, and software distribution, making them a reliable choice for both personal and commercial use.