Stateless Session Beans are a type of enterprise Java bean used in Java EE applications. They do not maintain any client-specific state between method calls, meaning each request is independent. This makes them lightweight and suitable for handling multiple requests simultaneously, as they can be easily pooled and reused. These beans are typically used for operations that do not require persistent data storage, such as calculations or data retrieval. They are managed by the Java EE container, which handles their lifecycle, including creation, pooling, and destruction, ensuring efficient resource management in enterprise applications.