Businesses organize their activities into four main functional areas: marketing, operations, finance, and human resources. These functional areas work together to satisfy customers, control costs, manage resources, and react to the market. Specifically, marketing activities involve understanding customer wants and needs to design products and services, as well as promoting them. Operations activities focus on efficiently producing goods and services. Human resources oversees hiring, training, and managing employees. Finance manages the company's money and ensures bills can be paid. Together these functional areas allow businesses to effectively operate.