The **TLS (Transport Layer Security)** protocol is used to send data over the internet securely using **encryption**. It is designed to provide a secure channel between two communicating applications, ensuring the confidentiality and integrity of data being transmitted. TLS is commonly utilized in various applications, including HTTPS for secure web browsing and email protocols. By encrypting data in transit, TLS helps protect against eavesdropping, tampering, and forgery, thereby enhancing overall cybersecurity measures for users and organizations.