Knowing how the industry is mapped out is important, because the collective combination of all participants creates the market you trade in. The relative weight of the trading party to the market is measured by how much money that party manages – from billion dollar hedge funds and investment banks, to private traders with a few thousand dollars in action.
The foreign exchange market is an over-the-counter (OTC) marketplace that determines the exchange rate for global currencies. Participants are able to buy, sell, exchange and speculate on currencies. Foreign exchange markets are made up of banks, forex dealers, commercial companies, central banks, investment management firms, hedge funds, retail forex dealers and investors.
Trading currencies is the act of making predictions based on minuscule variations in the global economy and buying and selling accordingly. The exchange rate between two currencies is the rate at which one currency will be exchanged for another. Forex traders use available data to analyze currencies and countries like you would companies, thereby using economic forecasts to gain an idea of the currency's true value.
The foreign exchange market is where currencies are traded. Currencies are important to most people around the world, whether they realize it or not, because currencies need to be exchanged in order to conduct foreign trade and business. If you are living in the U.S. and want to buy cheese from France, either you or the company that you buy the cheese from has to pay the French for the cheese in euros (EUR). This means that the U.S. importer would have to exchange the equivalent value of U.S. dollars (USD) into euros. The same goes for traveling. A French tourist in Egypt can't pay in euros to see the pyramids because it's not the locally accepted currency. As such, the tourist has to exchange the euros for the local currency, in this case the Egyptian pound, at the current exchange rate.