What is a Steam Wallet?

Could you please elaborate on what a Steam Wallet is? As someone new to the world of digital currencies and online gaming, I'm curious to understand how it works and what benefits it offers. Does it function similarly to other digital wallets, or is it specifically tailored for use within the Steam platform? Additionally, how do users go about adding funds to their Steam Wallet, and what are the various methods of payment accepted? I'm eager to learn more about this concept and how it fits into the larger landscape of cryptocurrency and finance.