As you continue to maintain and expand your store, you wll manage customer accounts and customer groups in the Admin. You can access the customer management tools from the Customers menu.
For Magento Commerce for B2B, the Company component is the key entity within B2B on which all other features are in some way dependent. It allows joining multiple buyers that belong to the same company into a single company account (or corporate account). You can configure Company Accounts in your store to allow customers to set up and maintain their own company hierarchy of teams, with different levels of user permissions.