Shared SSL requires that your site runs on a shared IP. If in your plan, you are being offered a Shared SSL certificate, you can use it instead of purchasing a certificate of your own. Unlike a regular SSL certificate, it costs less, doesn’t require a dedicated IP, and belongs to an equally trusted Certificate Authority. The disadvantage of shared SSL is that it can be used only with third level domains.
To secure your site with Shared SSL, do the following:
1. Select Domain info in the Domain Settings menu.
2. Click the Edit icon in the Web Service field.
3. Enable Shared SSL for the domain in the list.
4. Agree to charges, if any.
5. If you are using a second level domain (example.com), you will be asked to create a third level domain alias (e.g. domainalias.example.com):