What is FDUSD?

Could you please elaborate on the concept of FDUSD? I'm curious to understand its definition and what it represents in the realm of finance and cryptocurrency. Could you explain its purpose and how it functions within the financial ecosystem? Additionally, I'm interested in knowing if FDUSD is a widely recognized and trusted form of digital currency. Is it regulated or overseen by any authority? Lastly, how does FDUSD differ from other cryptocurrencies and what are its unique features or benefits? Thank you for clarifying these points for me.