Trade is simply the trading of something for something else. This can be one good for another good, one good for money, one good for a service, a service for a good, money for a service, etc.
And for how it helps them; well consider some civilization have too much of crops, rice or anything. What they will do? They will either store or sell it expecting money or wealth or exchange it with other goods.
The trade people formed guilds to protect the interests of people who worked in a particular trade or craft.
yes people still trade you may even still have grandparents that trade
His trade was about entertaining people.
they trade tobacco
The people of indus valley did not trade with the mayans
Millions of people in total were in the slave trade worldwide.
The reason people trade is because they get new stuff that people don't have in their country.
Trade introduced people to new religions and beliefs.
were people go acros the Sahara Desert to trade with other people.
were people go acros the Sahara Desert to trade with other people.
were people go acros the Sahara Desert to trade with other people.
Spanish usually trade spices