HTTPS (Hypertext Transfer Protocol Secure) is a secure version of HTTP (Hypertext Transfer Protocol). The main difference between the two is that HTTPS uses SSL/TLS (Secure Sockets Layer/Transport Layer Security) to encrypt all data transferred between the server and the client, while HTTP sends data in plain text. This added security of HTTPS helps to protect the privacy and integrity of the communication, making it more difficult for attackers to intercept and eavesdrop on the data being transmitted. Additionally, websites using HTTPS have a digital certificate, which verifies the authenticity and identity of the server, providing further protection against phishing and man-in-the-middle attacks. Overall, HTTPS is a more secure and safer way to transfer data over the internet than HTTP.