Cryptocurrency exchanges are online platforms that facilitate the buying, selling, and trading of cryptocurrencies. They serve as intermediaries between buyers and sellers, allowing users to exchange traditional currency for digital assets like Bitcoin and Ethereum. Exchanges can be centralized, where a single entity manages the platform, or decentralized, where transactions occur directly between users without a central authority. These platforms often provide various features, including market analysis tools, wallet services, and security measures to protect users' funds. Popular exchanges like Coinbase and Binance have made it easier for individuals to enter the world of digital currencies, contributing to the growing adoption of blockchain technology.