On the Left Navigation Menu, Select Offers 

Click on the Add+ Offers option given below

Fill in essential details as mentioned in the form:-

Enter Offer Code/Name/Uses

Select Offer Max Uses Users & Type of Offer (Percentage or Fixed)

Now Enter Offer Amount & Offer Minimum Selling Price 

Select Offer Start / End Date and Start / End Time

Fill Offer Description in Offer Description Box & Upload Offer Image

Click on Save Offers