Hey @OtakuGamer92,
The main idea of Stadia is to "play where you want and when you want". You don't need much to be able to play Stadia (see here the requirements depending on TV/PC/phone), so it's basically very comfortable gameplay, because you can just start it and directly play without long patch-downloads first (which is the most annoying thing for playing PC or console games these days in my eyes). Also you don't need to pay much money for a console or a PC, everything you need is just (at the moment) a founder's or premiere edition or a buddy pass + controller (buddy pass users can't play on TV though atm, because they need a chromecast from the bundle).
Everything you need is just a good internet connection, to get the best quality results for gaming on Stadia. But even with a less good connection, you are also able to play.
A more extended explanation you can also find in this blogarticle of Google, where Stadia was presented.
Here are some more information about Stadia, that you might find useful:
