SSL, or Secure Sockets Layer, is a phrase that is used in connection with HTTPS. By effectively turning on the HTTPS protocol's padlock and assisting in the encryption of data provided by website users, the SSL facilitates secure communications between a web server and a browser. In plain English, the SSL certificate is what protects a website's users' private information from hackers.
adding an SSL component to your website provides advantages to SEO as well . The goal of SEO is to increase traffic to your website through organic search results on search engines.