It is important to have an understanding of how to control your site visiblity and editing. Through Sharing permissions, you can give another user the ability to edit your entire site or an individual page. You can control visibility options as follows:
To give page or site permissions to other individuals, you will need to enter their WW-P Google Address and decide what type of access your wish to grant time - view, editing or equal ownership.
A complete overview of site sharing is available HERE