Is ERC20 the same as USDT?

I'm curious about something related to cryptocurrency tokens. Could you please clarify if ERC20 is synonymous with USDT? I've heard both terms used interchangeably in some discussions, but I'm not entirely sure if they refer to the same thing. ERC20, I understand, is a technical standard used for smart contracts on the Ethereum blockchain, enabling the creation of fungible tokens. And USDT, I know, is a stablecoin pegged to the US dollar. But does the ERC20 standard automatically mean a token is USDT, or can ERC20 tokens represent various assets and values? I'm a bit confused about the relationship between these two concepts and how they are distinct or interconnected. Could you please explain?