Exchange is facilitated by specialization. When individuals, businesses or countries specialize in the production of a certain good or service, they become more efficient at producing it. This increased efficiency leads to lower costs, which makes it possible to offer the good or service at a lower price. As a result, people are able to trade the goods or services they produce for the goods or services produced by others, leading to an increase in overall economic activity and growth. Specialization is therefore a key driver of trade, which facilitates exchange between individuals, businesses and countries.