Most web based classified in line with the industry that they operate in. Some of these are large corporations that focus on a specific kind of industry, just like Apple or perhaps Walmart, whilst others specialize in a specific type of product or service. Examples of market sectors in which businesses may run include advertising and marketing, mattress creation, real estate, and oil. ExxonMobil, for instance, functions business by providing oil to customers. Other industries consist of restaurants, shops, and resource other small companies.