Any Snapfix user is the owner of their own business account. A business account contains details of your business, the subscription plan (Free and paid options available), the users that are part of the account
Each user can be part of multiple business accounts. Imagine you are invited into groups from the employer you work for. You are now part of their business account.
The business account page (accessed via the left side menu) shows all the business accounts you own and those you are invited into.