JSON Web Token (JWT) is a compact, URL-safe means of representing claims between two parties. It is often used for authentication and information exchange.In a JWT, the data is stored in a JSON format and consists of three parts: a header, a payload, and a signature. The header typically indicates the token type and the signing algorithm used. The payload contains the claims, which can include user information and expiration times. The signature is created using the header and payload, combined with a secret key, to ensure integrity.JWTs allow for stateless sessions, meaning a server does not need to store session information. When a user logs in, a JWT is generated and sent to the client. This token can then be sent along with requests to verify the user’s identity without needing to continually check the server.Due to its structure and security features, JWT is commonly used in various applications, including single sign-on (SSO) solutions, making it popular for user authentication. Its lightweight nature also facilitates easy integration across different platforms and services.