Now that you've created your Google site, you can share it with your friends, family, coworkers, or make it public. Just choose Share this site from the More actions drop-down menu.
Note: Share this site lets you choose who views, edits, and owns content on your site. Even with these controls, use care when you publish sensitive personal information on the web, since people who may or may not have permission may still be able to access and use this information in unauthorized ways. Sensitive information includes social security numbers, financial account information, home addresses, and phone numbers.
Users set to "Can view" can:
Users set to "Can edit" can:
Users set to "Is owner" can:
If you are a Google Apps user, you can also control sharing settings across the entire domain. However, if your Google Apps domain is managed by an administrator, the administrator can restrict your ability to share your site with people outside your domain.
You can send up to 50 invites per day. If you make your site public, you don't need to send invitations for people to be able to view it.
ข้อมูลอ้างอิง
https://support.google.com/sites/answer/153309?hl=en&ref_topic=23216