In order to enable the user registration, first, make sure that you have enabled this for your WordPress installation. Go to your admin dashboard, then navigate to Settings General, and check the option Anyone can register (Membership). For multisite, this option is slightly different.
There are two user roles: Customer and Business. These roles are different that the standard WordPress roles, let’s say that this is just a flag.
Both user roles are doing the same, the only different is that some sections in the user dashboard will be hidden for the standard customer.
You can pre-define the user role, or you can leave your customers to choose their role, navigate to Listing Types Settings Integration Account and mark the option Users can choose a role.
New user verification
In that same section, if you uncheck the option Users can choose a password, then the default WordPress verification will be triggered and an email with the user password will be sent.
But if you keep the option checked, then the users will be able to set their own password and the WordPress login screen will be bypassed.
Can I change the names of Customer and Business roles? — Yes, you can easily change these by simple translating the strings.