Session Beans are a type of enterprise Java bean used in Java EE applications to manage business logic. They are designed to handle client requests and maintain state information during a user's session. There are two main types: Stateless Session Beans, which do not retain any client-specific state between method calls, and Stateful Session Beans, which maintain state for a specific client throughout the session. These beans are typically used in Java applications to facilitate communication between the client and the server. They can be easily deployed in a Java EE container, which manages their lifecycle, security, and transactions, allowing developers to focus on business logic rather than infrastructure concerns.