Yes it is a great way to secure all the web pages. The main features of WildCard SSL certificate include the following:
- Secure private connection between the web browser and web server
- Unlimited sub-domains
- Free support offered through web and email
- All the operating systems, web servers, application servers and mail servers are supported
- All browsers are also supported
- Up to 256-bit Encryption is provided
- One WildCard certificate can be used for multiple sub-domains