Glossary
What is referral marketing?
Referral marketing is a growth strategy that incentivises existing users to recommend a product to new ones, typically through shareable links and reward programmes.
Why it works when it works
A recommendation from someone you know carries trust no advertising can buy, and referred users consistently show better retention and higher lifetime value than paid ones.
The economics are also unusually good, because the reward is typically paid only on a successful referral and often in product credit rather than cash.
What makes a programme work
- A product worth recommending. No incentive structure rescues a product people do not like. This is the whole prerequisite and it is regularly skipped.
- Two-sided rewards. The referrer gets something and so does the recipient, which removes the awkwardness of appearing to profit from a friend.
- A natural sharing moment, prompted when the user has just experienced value rather than on a settings page.
- Low friction. Every step between intent and a sent link loses a meaningful share.
- Rewards that fit the product, since credit toward something the user already wants is cheaper and more motivating than cash.
Why most programmes produce less than they appear to
Referral attribution has the same over-claiming problem as every channel targeting people who already know you.
Some referred users would have found the product anyway — through the same friend, mentioned casually, without a link. The programme captured the attribution rather than causing the acquisition. And rewards attract gaming: self-referrals through second accounts, and referral farming where the reward exceeds the effort.
The K-factor a programme reports is usually its most flattering number and its least reliable one. A holdout — withholding the programme from a random segment — is the only way to know what it caused.
Common questions
What reward size works best?
Large enough to prompt action, small enough that gaming is not worth the effort. Product credit usually outperforms cash at equivalent cost, because it is worth more to a genuine user than to a farmer.
How do I stop referral fraud?
Reward on a downstream event rather than on signup, verify device and payment uniqueness, and cap rewards per account. Paying on signup alone is an invitation.
More in growth and engagement
Acquiring users, and the behaviour that says whether they stayed.