SSL or Secure Sockets Layer is a technology used for establishing a secure connection between a client and a server. This is achieved throughout creating a secure encrypted link between the two. SSL ensures that the data that is passed between them will not be compromised or become corrupted.
In order for a secure connection to be established an SSL Certificate is required.
ETNHost offers many different types of SSL, which you can see here.
The customers can see if their session is protected, via the information provided by the web browser. It shows a lock in the upper-right corner, and if clicked on, the lock displays the SSL certificate. The certificate contains and displays the expiration date, the domain name, company name, address, and country.
The types of websites that usually need and use SSL are sites which need and use credit card information, bank accounts, account information, payment information and all kind of ecommerce systems.