Why is double coincidence of wants not necessary in an economy where money is used as a medium of exchange - Social Science - Money and Credit

Question

Why is double coincidence of wants not necessary in an economy
where money is used as a medium of exchange?

Smriti · Accepted Answer

Double coincidence of wants is not necessary where money is used as
a medium of exchance as one can buy any commodity that he/she needs
in exchange of money but this is not the case in double coincidence
of wants where the individuals have to exchange the commodities of
each other whether they really need it or not

Why is double coincidence of wants not necessary in an economy where money is used as a medium of exchange?