HTTPS, which stands for Hypertext Transfer Protocol Secure), is a protocol for secure communication on the World Wide Web. It uses SSL (Secure Sockets Layer) to add an extra layer of security to the standard HTTP connection, i.e., it is a secure version of HTTP. It encrypts all data or communication between the server and the browser.
The websites which use HTTP protocol, the data is transmitted between the site server and the browser as plain text, so anyone who intercepts your connection can read this data. Earlier, only the websites that handle sensitive data like credit card information were using it, but now almost all sites prefer HTTPS over HTTP. An HTTPS connection provides the following benefits:

Website Authentication
Data Integrity
Data Encryption