Why is IT Outsourcing Necessary for Businesses?

Among the several unexpected challenges that slows down the process of growth of an organization is the lack of trained expertise. Internet has resolved this issue to a major extent by allowing communication at blazing speed. Services of a business or entity are available on hire irrespective of they being in a different geographical zone.
Benefits of outsourcing:

Controls IT Budget: Outsourcing removes the fixed IT expenses and converts it to a volatile cost allowing the business to pay only for the services they use. They are saved from the huge expenses of hiring staff, training them, pay salaries and other perks.