When you sign up for a new account, an account is created with a new Organization Account structure with a unique organization ID. The Organization Account follows the below organization structure. P1 has full access to all the organizational resources and P4 has the least access.
As the signed-up user is the first user of the Organization Account, the Super Admin role is assigned to the signed-up user by the default. The Super Admin can assign the Super Admin role to other employees up to 4.