u/Key_Amphibian_8416

So I won this Amazon gift card on galaxy bids and I’m kind of confused on what I’m supposed to do next. I’ve never really used a gift card like this before, so I’m not sure if it’s as simple as adding it to my Amazon account or if there’s something else I need to do first. Do you just type in the code at checkout, or is there a step where you redeem it somewhere before that? Also wondering if it works like a balance that sits on your account or if it has to be used all in one go.