A Post-Purchase Survey asks customers on the order confirmation page how they heard about you. Klar uses those answers to enrich your attribution data with zero-party signals that UTMs and the pixel can't capture — like word of mouth or upper-funnel channels.
New to PPS? → Why you should use Post-Purchase Surveys
Which integration should I use?
Klar supports three ways to connect your PPS data:
KnoCommerce — native integration Direct API connection. Klar customers get API access in KnoCommerce even on the free plan. → Post Purchase Survey Integration - KnoCommerce
Fairing — native integration Direct API connection, same experience as KnoCommerce. → Post Purchase Survey Integration - Fairing
Any other tool — Custom PPS Sheet Using Typeform, Okendo, or a custom solution? Upload your responses manually via the Custom Post Purchase Survey Google Sheet datasource. → Using the Custom Post Purchase Survey Sheet
Tips for better results in Klar
Keep a 1-to-1 relationship between your PPS answer options and your channel names in Klar — this makes the matching in the Channel Builder automatic and clean
Include word of mouth as an answer option — it's often a major acquisition driver that UTM tracking can't see
Ask follow-up questions to clarify broad answers: "How did you hear about us? → Instagram" then "Where on Instagram? → In an ad / From an influencer"