SSL (Secure Sockets Layer) is a standard security protocol for establishing encrypted links between a web server and a browser in an online communication.
The usage of SSL technology ensures that all data transmitted between the web server and browser remains encrypted.
An SSL certificate is necessary to create SSL connection. You would need to give all details about the identity of your website and your company as and when you choose to activate SSL on your web server. Following this, two cryptographic keys are created – a Private Key and a Public Key.