A JSON Web Token is a quick and safe way for two parties to exchange information. It is a digitally signed JSON object that includes a number of claims or statements about an entity, such as a user. Due to their small dimensions, self-contained nature, and safe transmission via URLs, these tokens are often used for permission and authentication in web applications and APIs.
If you are interested in learning more about JSON Web Tokens, then the below video is a perfect guide for you -