1- The deal needs to have gone live on Amazon.com (or similar marketplace)
2-You’ll view the deal, just like the customer would, on your listing on amazon.com or similar. When the customer views the deal count down, that is what drives scarcity and an inventive to buy now. When a customer sees that a lot of other customers have taken-up the discounted offer and there is not many units left, that is what drives their ‘call to action’
3- Then you’ll increase your volumes in Seller Central – under the Advertising > Deals (for the US SC) — just note, that Amazon could change the ability to increase volumes but at the ‘time of writing’ you can do that.