plasma is a Layer 1 block chain designed to pay stable coins. It has a connection with Ethereum Virtual Machine and ascertains transactions within less than a second.
In order to transfer USDT, you can do it without gas fees, it uses gas in the form of stablecoins, and it uses Bitcoin as a security measure. This allows Plasma to provide individuals with quick, equitable, and censorship-free payments to the shoppers and the businesses.