What is Crypto-to-fiat trading on Bittrex?

Could you elaborate on what Crypto-to-fiat trading entails on the Bittrex platform? Specifically, I'm interested in understanding the process, the currencies involved, and any specific features or benefits Bittrex offers for this type of trading. I'm also curious about the security measures and how they ensure the safety of transactions. Additionally, I'd like to know if there are any limitations or restrictions for Crypto-to-fiat trading on Bittrex and how the platform handles exchange rates and fees. Thank you for clarifying these details.