Most businesses are classified based on the industry they operate in. Some of these will be large firms that concentrate on a specific kind of industry, including Apple or Walmart, although learn about data rooms for real estate professionals others specialize in a specific type of products or services. Examples of market sectors in which businesses may use include advertising, mattress creation, real estate, and oil. ExxonMobil, for instance, functions business by providing oil to customers. Additional industries contain restaurants, retailers, and other small enterprises.