Hello, a crypto exchanger is a place where you can exchange cryptocurrency and withdraw the received amount to your card or bank account. This is a fairly common way to exchange coins for fiat in the cryptocurrency market. With the help of exchangers, you can exchange one cryptocurrency for another or convert it into cash. Personally, I recently started using the services of a crypto exchanger at https://www.trustchange.com/, which appeared on the market not so long ago, but has a lot of advantages over other crypto services, the main advantage being low commissions.