In today's digital landscape, security is paramount, and JSON Web Tokens (JWTs) play a crucial role in safeguarding data during transmission between parties. JWTs are compact, URL-safe tokens used for authentication and information exchange, ensuring data reaches its intended recipient securely. They consist of three parts: header, payload, and signature, with the signature verifying the token's authenticity and integrity. JWTs are commonly applied in user and API authentication due to their ability to facilitate secure, efficient communication without repeated credential sharing. Despite their benefits, such as increased security through public and private key pairs and compact size, JWTs have potential vulnerabilities, including issues with verifying signatures and the risk posed by the "None" algorithm. Compared to other tokens like Simple Web Tokens (SWTs) and SAML, JWTs are more versatile and easier to implement across different platforms and devices. While they offer robust security features, users must remain aware of potential risks and consider alternatives like session management software for enhanced protection.