Definitely Wildcard SSL Certificates helps us in many ways,
Wildcard SSL certificates work the same way as a regular SSL Certificate, allowing you to secure the connection between your website and your customer's Internet browser – with one major advantage. A single Comodo Wildcard SSL Certificate covers any and all of the sub-domains of your main domain.

If you have multiple sub-domains to secure then a Wildcard SSL Certificate purchase can save you hundreds or thousands vs the cost of buying individual SSL certificates. For example a single Wildcard SSL certificate for *.yourdomain.com can be used to secure:

payments.yourdomain.com
login.yourdomain.com
mail.yourdomain.com
download.yourdomain.com
anything.yourdomain.com