You can look at the links above, but basically you can share your Digital Downloaded Xbox One games with one other person.
For example, I download the Digital Version of, lets say CoD: Advanced Warfare (and I even buy the season pass). So now I have the game. But, lets so your friend bought the Digital Version of Destiny and you both want both the games. Where this is where game sharing comes into play.
Say Player 1 has CoD and Player 2 has Destiny. Player 1 can give Player 2 his account and Player 2 can give Player 1 this account. Now the only tricky part is that each Player needs to go to setting on the Xbox One while signed into the other person's account and their X1 as their home console and vice versa. By doing this it gives both players the ability to download each others games free of charge and they can both play at the same time.
One small catch is that you can set an account as a home xbox 3 times a year before it resets so you can do it again. Also games do not stack up, meaning, if I own CoD and share with my friend and then my friend wants to share that with another friend than it wont work.
What it boils down too is that what you Download a Digital Version of a game you get 2 license. You get one for that particular xbox that you downloaded the game from, and you also get one for your account. So that means you can take your account over to your friends house and download the game you bought and be able to play it on your friends console.
I hope this is all making sense. Also, for those wondering it, it is legal, MS put this for a good reason,
Now I know this is a long shot, and I don't want to sound like a big begger or anything but if anyone would to share their account with me so I could play some games I would more than appreciate it. Just send me a PM and maybe we could work out an agreement of some kind. I know no one on here knows me but I am just playing some X1 games i can't afford.
Well, for those that read this, thank you for reading and Merry Christmas too all!
-Remember you can only set your account to be a home xbox 3 times a year.