There is no usage guidance for this tag … yet!
Usage guidance, also known as a tag wiki excerpt, is a short blurb that describes when and why a tag should be used on this site specifically.
Separating duties limits the power of any one person or entity so that you can help prevent a single point of failure. For example, you can have two or more administrators who have responsibilities for administering different portions of your org. If you have only one administrator, consider assigning a backup person to the role. You can give the backup person the same profile or permission set that your primary administrator has.
Read User Management for best practices and more details