Why can't I publish?,Where is publish

Why can't I publish? I see a button to publish on the tutorial but not on the game I just made? Why? I'm brand new to Unity, so I don't know where it went? It's just gone.,I look in the tutorial and there is a publish button on the top, but now there isn't in my new game. I got unity, like, today so I don't know much about it. I don't see the WebGL thing or whatever.