For redemption at Go Rewards partner merchants, all you need to do is to present your Prepaid/Debit card and other requirements (If needed). The store personnel should scan the barcode at the back of the card to enable you to redeem your points.
Go Rewards Prepaid Card
Go Rewards Debit Card
Other partners will just need your Go Rewards membership number. For virtual accounts, a copy icon is present right beside where the membership number is displayed. This will eliminate the risk of typographical errors. You can check here to know where you can find your Go Rewards membership number.
It is important that you understand the redemption mechanics of the partner and keep track of your points before using them so you can plan and make the most out of your membership.