A bad deal is worse than no deal. A person who comes in for a 20% discount and is told “not on this item” at the counter will probably not return, and might tell others why. A good deal is mostly good writing.
Say the real numbers
“Up to 50% off” sounds suspicious. “Rs 200 off any shirt over Rs 1,500” is believable and easy to check. Use the price people usually pay as the old price, and never raise it just for an offer.
Write the terms before anyone asks
A customer should be able to answer these from the deal alone. What exactly is included? Which days and hours? Until what date? One per person, or more? Dine-in, takeaway or delivery? Does it combine with other offers?
Limit it honestly
If you only have 30 pieces, say so. A real limit is fair. A fake countdown is not, and customers notice when the “last day” comes back next week.
Tell your staff first
The most common failure is a customer showing a deal to a worker who has never heard of it. Tell everyone on the shift. On Whisper Perks a claimed deal is verified by QR code at your counter, so make sure whoever stands there knows how.
Afford it
Calculate your margin before posting. A deal should bring new customers or bring a quiet hour to life, not lose money on each sale until you quietly stop honouring it.
Afterwards
See how many people claimed it and how many returned. A smaller discount that brings loyal customers is better than a large one that attracts only bargain hunters.