A business practice whereby a company gives out some job functions and tasks to an external worker as a form of cost-cutting measure is what is known as outsourcing.
This business practice cut across wide range of jobs e.g. IT, customer support services as well as manufacturing which ideally can be performed by internal staffs and employees of the company.
Jobs are outsourced out so as to cut costs, creates more incentives for the business and also the effective allocation of resources to other areas of the company which are very much in need of it.