What technical aspect of a website's URL indicates a secure connection?

The technical aspect of a website's URL that indicates a secure connection is the presence of 'HTTPS' at the beginning of the address, instead of 'HTTP'. 'HTTPS' stands for Hypertext Transfer Protocol Secure. The 'S' signifies that the communication between your browser and the website is encrypted using Transport Layer Security (TLS) or its predecessor, Secure Sockets Layer (SSL). Encryption protects the data being transmitted, such as login credentials, personal information, and financial details, from being intercepted and read by unauthorized parties. In addition to 'HTTPS' in the URL, most web browsers display a padlock icon in the address bar to visually indicate a secure connection. Clicking on the padlock icon usually provides more information about the website's security certificate. A website using 'HTTP' without the 'S' means the connection is not encrypted, and data transmitted can be vulnerable to eavesdropping. For example, if you visit 'http://example.com', your connection is not secure. But if you visit 'https://example.com', your connection is encrypted and secure.