A Secure Sockets Layer (SSL) Certificate creates an encrypted link between a Web site and a visitor's Web browser. This link ensures that all data passed between the Web site and the browser remains private and secure.
The Certificate also demonstrates to your visitors that your Web site is owned by a legitimate business. This is done through a validation process performed by a Certificate Authority (CA) prior to issuing you an SSL Certificate.
Finally, the SSL Certificate puts the "s" in "https" in the Web site address (URL), and puts the closed padlock on the browser — items most consumers look for when transacting business online.
Secure Certificates are recommended for ALL E-commerce website, and also recommended for any website that gathers & stores client information like email addresses, phone numbers & private / business addresses.