What is HTTPS?
That encryption requires the installation of a so-called SSL certificate. Each domain name has its own unique SSL certificate, which means it cannot be copied, and it is almost impossible for outsiders to capture the information being transferred via a website.
Once a website has been secured with HTTPS, the URL of the website starts with ‘https://’ and it used port 443. Many browsers display a green lock to the left of the URL bar, as proof that this is a secure website with a valid SSL certificate.