What is the Chicago Mercantile Exchange (CME)?

Could you please elaborate on what the Chicago Mercantile Exchange, or CME, is? I'm curious to know how it fits into the world of finance and trading, especially when it comes to cryptocurrencies and other financial instruments. What types of products does it offer for trading, and how does it differ from other exchanges? I'd also like to know if there are any notable features or regulations that make it stand out in the industry.