How do you pass quiz results into Klaviyo as custom properties?

Most Shopify quiz apps handle this through their native Klaviyo integration. During setup, you map each quiz question or result to a custom property name in Klaviyo — for example, mapping a question about skin concerns to a property called "quiz_skin_concern." When someone completes the quiz, the app creates or updates their Klaviyo profile with these properties attached. Best practice is to use consistent, lowercase, snake_case naming conventions for your properties so they're easy to reference in segments and flows. Also consider passing a "quiz_completed_date" property and a "quiz_recommended_product" property alongside the individual answers. If your quiz app doesn't offer native Klaviyo support, you can use Zapier or a custom webhook to push the data, though this requires more setup and maintenance.