Business process outsourcing (BPO) is the practice of contracting a specific work process or processes to an external service provider. The services can include payroll, accounting, telemarketing, data recording, social media marketing, customer support, and more. BPO usually fills supplementary — as opposed to core — business functions, with services that could be either technical or nontechnical.

From fledgling startups to massive Fortune 500 companies, businesses of all sizes outsource processes, and the demand continues to grow, as new and innovative services are introduced and businesses seek advantages to get ahead of the competition. BPO can be an alternative to labor migration, allowing the labor force to remain in their home country while contributing their skills abroad.

BPO is often divided into two main types of services: back office and front office. Back-office services include internal business processes, such as billing or purchasing. Front-office services pertain to the contracting company’s customers, such as marketing and tech support. BPOs can combine these services so that they work together, not independently.