SSL and Secure Certificates provide security for your website by encrypting communications between the server and the person visiting the website.
There are two main reasons why you would need an SSL Certificate. The first and most common reason is because you want to accept credit card payments on your website. The second reason is that you may have confidential information that you want to keep secure while it is being accessed via the web. SSL Certificates also help to protect your passwords from being intercepted, when typed into a secure login page.
You can get SSL certificates for your website from http://www.tucktail.com/ssl/ssl-certificates.aspx?ci=1790&prog_id=447401
here they provide 2 SSL certificates. These are Standard & Premium. You can choose one among them depending on the type of website. Along with certificate they provide you FREE Malware Scanner to monitor your site for malicious links inserted by hackers. They provide good customer service and support.