A great way to increase your sales is offer promo codes to your existing or potential customers. Just announce the promo code on your site or on your newsletter and see the sales increase 100-500% easy!  

Feature details:

• Limited/unlimited amount of promo codes
• Choose amount to discount, based on % of fixed amount
• Choose the beginning and the end date that this promo code will be active
• Choose to give the promo code only to existing customers
• Choose to apply the promo code before or after tax
• See how many times the promo codes was used
  
• See how many promo codes are left
• Promo codes can only be lower case to avoid confusion by users
  

Tips:

• Limit the promo code for no more than 72 hours and stick to it
• Announce your sale on your site and on an email blast
• Keep the promo code simple. A promo code that's too long could be confusing. Use a word that makes sense, like "birthday".