What the Security Administration area of your website does.
The Security Administration Area of your website is used to view and control the User Roles and Permissions of your site, and to add, edit or delete Users and Roles. Deleting a user account removed all associated memberships and any associated user data like store purchases and event tickets.
You can select Permissions for Users, restrict pages viewable to the public, and dictate pages that are viewable only to those with a login.
The User Accounts area allows you to view, add, edit and delete Users and their permissions, and to import and export User Accounts.
To enter the Security Administration Area, you must be logged as an Admin. Click Security on the top menu bar.
For more in depth information on using the Security Module, see the below articles: