1. Replicate the promo code for postermywall you wish to use from the page, and click to get code.
2. Next, you'll witness the offer code being showcased and auto-copied to your clipboard.
3. You'll subsequently have to navigate back to the postermywall's checkout page, locate the promo code box, and insert the code you just duplicated into it.
4. Finally, you need to click Apply Code to see how much discount you have on your current order.