Running social media based promotions can be a great way to create urgency and drive traffic to your site for your followers. Use the random product promotor to add "Automatic discounts" which are codes that are generated when the post is generated and can be applied by the shopper during checkout.

Automatically generated random discount codes that are valid for a time specified. 12, 24 or 48 hours. These codes are shown on the post.

Discount codes are generated using the shopify default functionality as shown below.