How Did Paper Money Start Being Used?

Paper money started when people realized carrying coins was a pain. Long ago, people used real things like cows or grains to trade. Later, they used metal coins, but they were heavy and hard to carry. So, someone came up with the idea of using paper instead, it was lighter and easier to carry around. People trusted that the paper could be turned back into real value later. And just like that, paper money began to appear in many places!