CoinMarketCap is a website that provides information about the current market capitalization of various cryptocurrencies. It displays the current price, market capitalization, and trading volume of each cryptocurrency, as well as a chart showing the price movements over a certain period of time. CoinMarketCap also provides information about the exchanges on which each cryptocurrency is traded and the number of coins that are in circulation. The website is a useful resource for those interested in learning about the cryptocurrency market and for those who are looking to buy or sell cryptocurrencies.