By default, WordPress arrives with five default user roles: Contributor, Subscriber, Author, Editor, and Administrator.
However, when you start installing plugins, you may see many extra roles.
For example, if you install Yoast SEO, there will be two new roles: “SEO Editor” and “SEO Manager”. If you then add WooCommerce, you'll find two more roles: “Shop manager” and “Customer”. The more plugins you add, the longer this list will become:
Is it possible to delete these extra roles, if you don't want to use them? Yes, you can delete user roles with the Capability Manager Enhanced plugin.
First, install the Capability Manager Enhanced plugin into your site.
In your WordPress admin menu, go to Users > Capabilities. In the top-right corner of this screen, look for the “Select Role to View / Edit” dropdown.
Choose the role you want to delete. In the image above, I want to delete “SEO Editor”. Click “Load”.
Scroll to the bottom the screen and click "Delete role". You can see this link in the image below:
Next, you'll see a confirmation pop-up box. Click "OK" to delete the role:
FInally, you'll see a message saying that the deletion was successful. Any users in the "SEO Editor" role will be moved to the "Subscriber" role.
"Subscriber" is a very basic role with the fewest permissions of all the default WordPress user roles.