If you’ve set up Admins for your Facebook, you’ll know that previously every Admin had full control and access of your Page. Facebook has now defined specific roles for Admins that you can pick and choose.
To update your Admin roles, go to Edit -> Admin Roles
You can either edit an existing Admin and change their role or create a new Admin and specify their role. You can choose from Manage, Content Creator, Moderator, Advertiser, Insights Analyst.
As you can see from the Facebook official help files, they define each of those roles for you (Reference: https://www.facebook.com/help/?page=394501407235259)
Now you can make sure that your Admins only access the areas of your Page that you want them to.