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Prevent duplicate Pinterest events

Pairing the Pinterest Tag (client-side) with the Pinterest Conversions API (server-side) allows you to combine speed with reliability, capturing more complete conversion data while staying resilient to browser restrictions and tracking prevention. To make this setup work correctly, enable better attribution, and avoid inflated conversion counts, Pinterest Event Deduplication is crucial.

This guide outlines a step-by-step approach to configuring Pinterest Event Deduplication using Google Tag Manager (GTM) and TAGGRS. It includes helpful links to deeper resources and examples, with additional pointers for those ready to explore more advanced Pinterest tracking practices.

Generate a unique Event ID

  1. Use a random string, UUID, or a combination of timestamp and transaction ID for uniqueness.
  2. Generate the event_id in your website’s data layer or with a GTM Custom JavaScript variable.
Example Custom JavaScript Variable:

function() {
 return 'tt_evt_' + Date.now() + '_' + Math.floor(Math.random() * 100000);
}

Push the Event ID to the data layer

On the relevant event (e.g., purchase, add_to_cart), push the event_id along with other event data:

window.dataLayer.push({
  event: 'purchase',
  event_id: 'tt_evt_1721456789123_45678',
  // ...other parameters
});

Reference the Event ID in GTM (web and server)

  1. In GTM web container (Pinterest Tag): Add event_id as a parameter.
  2. In sGTM server container (CAPI): Add event_id to your HTTP request payload.

Test deduplication

Use GTM Preview mode and Pinterest diagnostics to ensure deduplication is working and only one conversion is counted per user action.

Best practices

  • Always generate and assign the event_id at the moment of the user action.
  • Use the exact parameter name event_id in both implementations.
  • Ensure uniqueness to avoid accidental deduplication of separate actions.
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TABLE OF CONTENTS
Generate a unique Event IDPush the Event ID to the data layerReference the Event ID in GTM web container (TikTok Pixel)Reference the Event ID in GTMTest deduplicationBest practicesUseful resources