pls tell me how 2 use them? as a new player I don't know how to use them that copy button have anything to do with using the gift key?

if u have 3 gift keys ;just copy ur gift keys, and give it to a new player who is like level 4, 5

or if u have a space to enter a gift key, ask from some one who has and paste it or type it there letter one by one and when u add someone's key into ur account you will get 25 000 sm credits

the one who owns the key gets bonus
when the one who add the key(you) complete the levels 5 levels = 5000 SM
10 levels = 15 000 SM and when you complete 15 levels after you add his key; he will get a golden box.

I believe what iitiit is trying to say that EVERY players have 3 gift keys. And for a newbie, I am most certain that you have to be levels 1-5 to use one. However, you can only use 1 gift key which will give you 25k credits. And the key giver will receive certain amounts of credits and a golden item box once the player whom you gave the key reaches a certain level;
Lvl. 7 - 5000 credits
Lvl. 12 - 15000 credits
Lvl. 16 - A golden item box

And now, "How to use a gift key?" Simple! You only have to find a certain player via PM then, get the code from....

Workshop the. At the bottom you can see a gift icon. Clicking that would lead you to your keys. First, copy then paste it on the chat bar. However, you have to make a big letter at the end of the key; small. Then just inform the player whom you will give the key that the last, small letter to be a capital one.