Crypto Exchange is a digital platform where you can buy, sell and exchange cryptocurrencies.
The exchange shows you the current market data. Cryptocurrency prices, trading volumes. You can see price changes over time and other important information.
Besides exchanging one crypto for another, you can buy cryptocurrencies using FIAT money, like EUR.
Exchanges provide you with a list of payment methods that you can use to buy crypto for FIAT money, like EUR. Or to sell crypto for EUR or other currency. These payment methods can be bank cards, wire transfers, or others.