Manage Sites Members Page Explained

You can add members to your sites by going to "Manage Sites" > "Members" page.

Select the site you want to manage by selecting the site from the "Select for a Site to Manage" drop down menu, then click "Manage".

You can search for a site member by using the "Search Members" box.

You can also add a new member by searching for his/her name in the "Search for People to Add" box, and click "Add". Once you have added a site member, you can make him/her a manager by clicking on the "Make Manager" link.
You can click the "Remove" button to remove a member from the site.

You can click on "Everyone" to see all the members of the site.

You can click on "Managers" to see the managers and owners for the site.