Most web based classified in line with the industry that they operate in. Some of these happen to be large corporations that concentrate on a specific kind of industry, including Apple or perhaps Walmart, when others specialize in a certain type of products or services. Examples of sectors in which businesses may conduct include advertising, mattress creation, real estate, and oil. ExxonMobil, for instance, functions business by providing oil to customers. Other industries incorporate restaurants, shops, and require professional or technical disciplines other small companies.