Shared Memory is a method used in computer systems that allows multiple processes to access the same block of memory. This enables efficient communication and data exchange between processes, as they can read and write to the same memory space without needing to copy data back and forth. In operating systems, shared memory is often implemented through specific APIs that manage access and synchronization. This ensures that processes do not interfere with each other, maintaining data integrity. It is commonly used in applications that require high performance, such as multimedia processing and real-time systems.