HTTPS (Hypertext Transfer Protocol Secure) is a protocol for secure communication over the Internet. It is the secure version of HTTP, the standard protocol used for transmitting data on the World Wide Web. The "S" in HTTPS stands for "secure."
HTTPS encrypts the communication between the client (e.g., a web browser) and the server using SSL/TLS encryption to ensure that the data exchanged between them cannot be intercepted or tampered with. This makes HTTPS particularly important for websites that handle sensitive information, such as online shopping sites and financial services.
In order to use HTTPS, a website must obtain an SSL/TLS certificate from a trusted certificate authority. The certificate authenticates the website's identity to visitors and allows the client to establish a secure connection to the server.
Browsers can typically be set to automatically use HTTPS for sites that support it, and many websites are now automatically redirecting all HTTP traffic to HTTPS to improve security. The use of HTTPS is becoming increasingly widespread, as website owners and users alike place a greater emphasis on privacy and security online.