What can you use stETH for?

I'm curious, what exactly can you use stETH for? It seems to be a hot topic in the crypto world these days, but I'm still a bit hazy on its practical applications. Could you elaborate on its uses and maybe give some examples? I'm particularly interested in how it can be leveraged in financial transactions or investments. Would it be possible to use stETH as collateral for loans, or is it more suitable for trading and speculation? Also, are there any specific platforms or exchanges that cater to stETH transactions? Your insights would be greatly appreciated.