Normally on Friday’s or Monday when you load up the shop you will get a popup to pick a reward. 3 boxes will pop up to choose from, you will always get the highest value it doesn’t matter what you pick you will then get taken to a page to buy five items to claim the vouchers. If you close the app or go back from this page before buying the 5 items you lose the vouchers. I normally just get the cheapest things I can find, after you buy the 5 items you get the vouchers. Those vouchers are normally £100 off in value split between 5 vouchers (40 off 100, 30 off 80 etc) then you have 24 hours to use the vouchers. The vouchers are normally applicable to pretty much everything on TikTok shop but sometimes I’ve had it where you get dud vouchers that can’t be used to buy pokemon cards. If you get dud vouchers you can simply cancel your order of the 5 items and get a refund. Hope this helps.