In Drupal you can use roles to group a set of users to your site and give them set permissions or privileges. Your initial account is a super user. It is advisable to create an administrative role called "admin" and grant this role capabilities to administer and manage everything similar to an admin.

By default there are two roles as part of the installation - anonymous users and authenticated users. Anonymous user is any visitor to your site that does not login. Authenticated user, on the other hand, is any user who requests a login to your site. By default, visitors to your site have the permission to create an account on your site and inherit the privileges assigned to authenticated users. If you do not wish to have users on your site to have such privileges, you can control this from administer » user management » user settings. By selecting the option "Only administrators can create new user accounts" you can control the creation of new user accounts:

For my site JoeMatthew.com I am going to disallow anyone other than administrators to create new accounts and inherit privileges. For my site Gotofamousfootwear.com I am going allow shoppers to create their own account if they wish to do so.

For this, I will leave it to the default of "Visitors can create accounts and no administrators approval is required".
Below are the privilege settings for my JoeMatthew.com site and GotoFamousFootwear.com that you can mirror to follow along with this workbook without any permission issues

My Access Control settings for JoeMatthew.com

My Access Control settings for GoToFamousFootwear.com

Video
In this video you will see how to

• Create a new role
• Manage the privileges of this role
• Change the account creation settings for your site
• Create a new user account and assign it to a role.