If you're interested in discounts for GoDaddy domain names, I'd suggest looking around at what the different hosting companies are offering.
They pretty much always have some sort of discounted domain name offer going to try and entice people. Just make sure the price of the hosting makes the domain coupon worthwhile.
Alternatively, some website builders also give out discounted domain names AND hosting. Some even give you AdWords and Facebook Ad credit, so it's definitely worth shopping around to see what the best deal is!