Doing it properly.
WHAT TO SET
A clear reason A clear end date Conditions A usage limit
THE END DATE
Open-ended discounts become permanent prices.
THE USAGE LIMIT
A code shared publicly is used without limit unless you set one.
That happens regularly.
Limit per code and per customer.
WHAT CONDITIONS TO CONSIDER
Minimum spend Specific products First-time customers only Not combinable with other offers
MINIMUM SPEND DISCOUNTS
Better than blanket discounts, since they increase order value.
FREE DELIVERY THRESHOLDS
Frequently more effective than a percentage discount, and cheaper.
Set the threshold above your average order value.
WHAT TO AVOID
Discounts on your best sellers, which would have sold anyway Stacking offers accidentally
WHAT TO MEASURE
Whether the discount generated additional sales or discounted existing ones.