A forex broker is a firm or individual that acts as an intermediary between you and the interbank system, where currencies are traded. Brokers provide a platform for retail traders to access the forex market, execute trades, and offer various tools and resources for trading. They make money through the spread, which is the difference between the buying and selling price of a currency pair, and sometimes through commissions on trades. Forex brokers play a crucial role in facilitating transactions, offering leverage, and providing market analysis and educational materials to help traders make informed decisions.