An SSL certificate is a data file hosted in a website's origin server. SSL certificates make SSL/TLS encryption possible, and they contain the website's public key and the website's identity, along with related information.

An SSL certificate is a bit of code on your web server that provides security for online communications. When a web browser contacts your secured website, the SSL certificate enables an encrypted connection. It's kind of like sealing a letter in an envelope before sending it through the mail.

The web server sends the browser/server a copy of its SSL certificate. If so, it sends a message to the web server. The web server sends back a digitally signed acknowledgement to start an SSL encrypted session. Encrypted data is shared between the browser/server and the web server.

SSL Certificates are small data files that digitally bind a cryptographic key to an organization's details. When installed on a web server, it activates the padlock and the https protocol and allows secure connections from a web server to a browser. A domain name, server name or hostname.