HTTP (Hypertext Transfer Protocol) is a communication protocol used for the transfer of data on the World Wide Web. It allows web browsers to access websites and web applications by enabling the exchange of information between web servers and clients.

HTTPS (Hypertext Transfer Protocol Secure) is an extension of HTTP that provides an additional layer of security. In contrast to HTTP, HTTPS uses encryption to ensure that the data transferred between a web server and a browser is encrypted and thus protected against unauthorised access. HTTPS uses a combination of SSL (Secure Sockets Layer) or TLS (Transport Layer Security) encryption to protect the data.

If a website uses HTTPS, this is indicated by the presence of a lock symbol in the address bar of the browser. This reassures users that the connection between their browser and the website is secure and that their data is protected.

Compared to HTTP, HTTPS is more secure and offers protection against man-in-the-middle attacks, in which an attacker attempts to intercept or manipulate the data during transmission. HTTPS is particularly essential for websites that process sensitive data such as personal information or financial data.

Overall, HTTPS is an important technology for increasing the security of websites and web applications and ensuring that the data transmitted is protected. It is important that website operators use HTTPS to protect their users and increase trust in their website and their organisation.