Explanation:

Barter is an act of trading goods or services between two or more parties without the use of money —or a monetary medium, such as a credit card. In essence, bartering involves the provision of one good or service by one party in return for another good or service from another party.
Bartering is based on a simple concept: Two individuals negotiate to determine the relative value of their goods and services and offer them to one another in an even exchange. It is the oldest form of commerce, dating back to a time before hard currency even existed.While the current senior generation bartered with the limited goods they had on hand (i.e., produce and livestock) or services they could personally render (i.e., carpentry and tailoring) to someone they knew, today most Americans have access to a nearly unlimited source of potential bartering partners through the internet.

Virtually any item or service can be bartered if the parties involved agree to the terms of the trade. Individuals, companies, and countries can all benefit from such cashless exchanges, particularly if they are lacking hard currency to obtain goods and services.