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WT stands for JSON Web Token. It is a compact and self-contained way of transmitting information between two parties as a JSON object. JWTs are commonly used for authentication and authorization purposes in web applications.

A JWT consists of three parts: the header, the payload, and the signature. The header contains information about the token, such as the algorithm used to sign it. The payload contains the claims or statements about the user or other relevant data. These claims can include information like the user's ID, role, or any other custom data. The signature is created by combining the header, payload, and a secret key, and it is used to verify the integrity of the token.

Session tokens, on the other hand, are tokens that are used to manage sessions in web applications. A session token is typically generated by the server when a user logs in or starts a session. The server stores this token on the server-side and associates it with the user's session data. The token is then sent back to the client, usually as a cookie or in the response body, and is included in subsequent requests to the server.