Ancient Greece was a really, really long time ago, but it was a place where people traded things to get what they needed. Back then, people didn't have money like we do now. Instead, they would trade things they had or could make for things they wanted.
For example, a farmer might trade some of his crops to a blacksmith for a new plow. Or a potter might trade some of her pottery for some wool from a shepherd. People also used things like metal, salt, and animals as commodities, which means they were things that had value and could be used to trade for other things.
Greece was a place with a lot of different cities and each city had its own economy, which means the way they traded and got things they needed was a little different. But one thing they all had in common was that they traded with other cities and even other countries around the Mediterranean Sea.
The Greeks were also really good at making things like pottery and olive oil and they were known for their beautiful artwork. They would export, which means they would send those things to other places, and in return, they would import things like wheat, timber, and metals that they didn't produce themselves.
There were also people who worked as merchants, which means they bought and traded goods to make a profit. They would travel around to different cities, buying things that were cheap and then selling them for more money somewhere else.
In some cities, slavery was also a big part of the economy. Slaves were people who were owned by other people and had to work for them without getting paid. They would do things like farm work, domestic chores, or even work in mines.
Overall, the economy of ancient Greece was based on trade and exchange. People used things they had or could make as currency, and they traded with other cities and countries around the Mediterranean Sea. The Greeks were really good at making things like pottery and olive oil, and they were known for their beautiful artwork. Merchants traveled around to buy and trade goods, and in some cities, slavery was also a big part of the economy.