Is USDT better than USD?

Could you elaborate on why someone might consider USDT to be a better option than USD? Are there specific advantages or benefits that USDT offers that traditional USD does not? For instance, does it have lower transaction fees, faster transaction speeds, or greater accessibility for global transactions? Additionally, how does the stability of USDT's value compare to that of USD, and what measures are in place to ensure that its value remains pegged to the US dollar?