Explain what the SSL protocol is and what it is used for on the internet.

SSL (Secure Sockets Layer) is a cryptographic protocol that provides a secure connection between a client and a server on the internet. Its main task is to encrypt transmitted data to prevent interception and alteration by malicious actors.

SSL is used to protect confidential information, such as during online purchases, password transmission, and personal data. Its successor, TLS (Transport Layer Security), is now more commonly used, but the term SSL is still widely employed.

Example of use: when you visit a website with an address starting with https://, it means the connection is secured with SSL/TLS.