Where is barter trade used?
Barter can be bound bilaterally and multilaterally. This is an exchange of “something for something”, so anything that has value for the parties involved. Barter usually precedes negotiations.
The barter transactions take place in economies with volatile currency or hyperinflation. In the normal course of trade between firms barter agreements occur, wherever the subject is difficult to accurately quantify financially, and parties exchange something, which has for them a value or benefit. It could be a concession in the negotiations.