How does FIO work?

Could you please elaborate on the workings of FIO in a concise manner? As a cryptocurrency enthusiast, I'm particularly interested in understanding its underlying mechanisms and functionalities. How does FIO Protocol facilitate interoperability between different blockchains? What are some of the key features that make it stand out in the current market? Furthermore, how does the FIO Token play a role in the ecosystem, and what are its use cases? I'm looking for a concise yet comprehensive answer that encapsulates the essence of how FIO operates.