With shared SSL you get the benefits of SSL with out the costs that are usually associated with setting up a SSL on the server. with Shared SSL you use your web hosting company’s SSL certificate. With shared SSL you usually get a secure url like https://servername/~username
The Cpanel server provides users with a shared SSL and will always prompt you with a warning message before you can use it.
Its not a professional method to use a shared SSL for conducting online transactions.