What is the NEO Exchange?

Could you elaborate on the NEO Exchange, please? I've heard of it but am not entirely sure what it entails. Is it a cryptocurrency exchange platform? If so, what are some of its key features? Does it have a unique business model or approach to the market? Are there any specific cryptocurrencies that it focuses on trading? Furthermore, how secure is the platform? And how does it compare to other major exchanges in terms of user experience, fees, and liquidity? I'm interested in understanding the NEO Exchange from both a technical and a financial perspective.