At the top, click Preview .
At the bottom right, choose an option.
To exit, at the bottom right, click Exit (X) .
At the top, click Publish.
Enter test to complete the web address for your site.
Click Publish.
After you click publish, use the drop down menu to view how your published site looks to make sure it’s published correctly.
At the top, click Share .
Next to "Published," click Change. Then choose an option:
Anyone on the web
Specific people
To share with specific people, enter the name or email address of the person or persons you want to add,
Then, click Can edit or can view published
Then, click Send.
Click Save or Done.
Important: This is a request and doesn’t guarantee that your site won’t show up in public search engines.
This option is only available if your site is set to "Public on the web," and can be viewed by anyone.
At the top, next to "Publish," click the Down arrow .
Click Publish settings.
Click "Request public search engines to not display my site."
Click Save.
You can share your site with specific people or Google Groups.
On a computer, open a site in classic Google Sites.
At the top right, click Share.
Under "Invite people," enter the name or email address of a person or Google Group.
Click Send.
Optional: To remove a person or group, next to their name and click Delete .
There may be times you create a site in your school account. But, you also want to access it from another account at home.
If you’re not the owner of the site, have the owner share it with you.
If you're the owner of the site, follow these steps:
At the top, click Share.
Under "Invite people," add your work, school, or other group email address.
Next to your email address, choose "Is owner."
Click Send.
Taken From Google Sites Help