To enable Force.com Sites for the first time in your organization, go to the App Setup area and click Develop, Sites. You should see the screen shown in Figure 7.2.
You must pick a Force.com domain name to continue. A domain name provides a unique, root address for all of your sites. You can remap this address to your own brand-name address (not Force.com) by configuring a
CNAME alias on your domain hosting provider.