In case you offer products and services on your site and you'd like the payment details that users send to be protected, you will need an SSL certificate. Secure Sockets Layer is a protocol which encrypts the info exchanged between a user and a web server, but to receive an SSL, you will need a Certificate Signing Request (CSR). This is Base64 encoded data that the SSL vendor will use to create the certificate. The CSR contains the web address, Business name and Unit, mailing address and email of the entity which will use the certificate. The Certificate Authority reviews and authorizes the CSR before it provides an SSL certificate which is signed digitally with its private key as an authority. In order to install an SSL, you need a total of 4 batches of code - the CSR, a Private Key that is made once you generate the Request, the actual certificate plus a special Certificate Authority code, that is unique for every single vendor.