Is TRX different from TRC20?

Could you please elaborate on the difference between TRX and TRC20? I'm trying to understand the distinct features of each and how they differ in the cryptocurrency sphere. TRX seems to be associated with Tron, but how does TRC20 fit into the picture? Is TRC20 a type of token specifically designed for Tron's blockchain, or does it have a broader application? Also, what are the implications of these differences for investors and users? Thank you for clarifying these points for me.