Is TRC20 the same as USDT?

I'm hearing some chatter about TRC20 and USDT, and I'm not entirely sure what the relationship between them is. Could you clarify for me if TRC20 and USDT are essentially the same thing? I've seen them mentioned in the same breath in some crypto discussions, but I'm not sure if that's just because they're both tokens or if there's a deeper connection. Could you explain the difference, if any, between these two? And if they're not the same, how do they differ in terms of their functionality, usage, or value? I'm really trying to wrap my head around this crypto world, and your expertise would be invaluable in helping me understand.