Wild Stickers are a new feature added to Monopoly Go which basically allows you to exchange a Wild Sticker for any sticker that you are missing from your album. So unlike the Galaxy Pack where you are given a new card, the Wild Sticker option, allows you to select the one you want yourself, and this can be any card you don't have, normal or gold.
Some of you may already have been lucky enough to be granted a Wild Sticker, when it happens for the first time you are taken through an animation sequence and then basically asked to select a sticker that you would like in exchange for the Wild Sticker. You can't save it for later.
The game will show you a list of all the stickers that you are missing, and then you just select the one that you would like.
When I got mine, it seemed to just be granted. I was not completing anything in particular in the game, and didn't get it from a tournament or event. I just started the game and the Wild Sticker animation started.
However you will also be able to get Wild Stickers from some special events and from the Vault.
It's possible to get Wild Stickers from Special Events and also from the Vault.
When you get a Wild Sticker you are then shown a list of your missing Stickers, then you have to select then one that you would like in exchange for the Wild Sticker.
Yes you can pick any Sticker that you don't already have, even Gold ones.
Yes, there is no changing your mind once you have completed the process, although you do get the option to confirm your choice.
No, you can't use it later, you have to use it at the time you get it.
Yes, you can.
Nope, you'll only be able to select one sticker even during a Sticker Boom.
We have questions and answers related to this topic which may also help you:
Which sticker should I choose? Which one is the rarest or hardest to get? Lol
I went for Let's Go in the final set
Thank you. I will choose it too! I won't hold you responsible if I get one soon..lol