1. We give every new customers a 10% OFF for you first order, everyrone could ues once for this special welcome discount. Code number: lucky10
3. If you're checking out on mobile, during checkout, you'll arrive at a screen where you can enter your billing and payment information. At the top of the screen, you will see "Show Order Summary" with a down arrow next to it. Shopify hasn't quite nailed this just yet, but you'll have to manually hit the down button to reveal the discount code field. Enter the code and you're good to go!