Sales (Business Area) 

You use sales organizations to define your basic sales and distribution structure. Then you create sales organizations the organizational and legal structure of sales and distribution are very important.

You use sales areas to define your detailed sales and distribution structure. You can define customer-specific master data (conditions, rebates, and so on) and aspects of integration (rules for deriving business area account assignments) at this level.

You integrate your sales and distribution structure with your financial accounting and materials management systems using the division and distribution channel organizational units. Each division and distribution channel is assigned to the appropriate sales organization.

For more information on the organization of sales in the example enterprise, see:

Divisions
Sales Organizations

Distribution Channels and Sales Areas