A solid-state drive (SSD) is a type of storage device that uses flash memory to store data. Unlike traditional hard disk drives (HDDs) that rely on spinning disks, SSDs have no moving parts, resulting in faster read and write speeds. This technology allows for quicker access to data, improved system responsiveness, and enhanced durability against physical shock. As a result, SSDs are often used in laptops, desktops, and servers, offering superior performance and efficiency for various applications.