JWT (JSON Web Token)   Definition: JWT (JSON Web Token) is a secure way to share information between parties in a compact, self-contained format. Explanation: Used mainly in authentication systems, JWT allows users to log in once and remain authenticated without repeatedly sending their credentials. It’s commonly used in APIs, mobile apps, and single sign-on (SSO) systems. Since JWTs are digitally signed, they ensure data integrity, making them a trusted method for secure communication