HTTPS, or Hypertext Transfer Protocol Secure, is a secure version of HTTP that encrypts data sent between web servers and web clients. HTTPS uses SSL (Secure Sockets Layer) or TLS (Transport Layer Security) to create a secure connection, which helps to protect sensitive data such as login credentials, credit card information, and personal data from unauthorized access. HTTPS is becoming increasingly important for web designers and developers, as it is now a ranking factor in Google’s search algorithm and is required for many modern web applications.