Coupon is a voucher for your customers on the discounts offered at your restaurant. when you offer coupons  you need to create coupon in the admin panel. To create, go to Masters--> Coupon.  Select Add Coupon. 

In Create page select the coupon type like flat offer or percentage coupon from Coupon Type drop down. Now enter your Minimum Cart Value, Coupon Value, Coupon Code. Select the coupon valid dates in Start Date and End Date.

Provide your Coupon Name and Coupon Description. Now choose the coupon image in Choose a File Section.

Select either the coupon is active or inactive under Coupon Status and Save.