Read this support article about...
Every CreateTheWeb hosting package comes with a free wildcard SSL certificate, enabling you to use the more secure 'HTTPS' protocol to keep your site users secure. To activate the SSL, you’ll need to make sure you’ve pointed the domain name to our nameservers.
With that done, you need to:
Once the SSL Certificate has been activated, it will take up to 30 minutes to secure your website. This is due to the changes needed to be made on our load balancers.