You receive Printing Dots for every order. For every Pound net value of goods you receive one dot, which you can then redeem in subsequent orders.
The higher your volume of sales, the higher the discount. That is, the value of the collected Printing Dots increases along with the sales volume.
Your available Printing Dots will be shown in your shopping cart (when logged in to your customer account). There you can choose to redeem any number of your Printing Dots or keep some to use in future orders.