---
title: "Advanced eCommerce Product ID Linking"
description: "How the System Chooses Which Product ID to Send When you collect product information in your events to send to your analytics or ad platforms, Tracklution automatically picks which product ID to include. It checks several options in a set order and uses the first one that’s available. Order of priority (from highest to lowest): 1. variant_id 2. product_id 3. item_id 4. content_id 5. id This means if a variant_id exists in your tracking setup, it will be used as the product id…"
slug: "advanced-ecommerce-product-id-linking"
category_slug: "tracking-guides"
category_name: "Tracking Guides"
order: 3000000047
published_at: "2025-11-07T12:12:32+00:00"
updated_at: "2026-04-14T12:00:11+00:00"
language_code: "en-US"
tags: []
---

## How the System Chooses Which Product ID to Send

When you collect product information in your events to send to your analytics or ad platforms, Tracklution automatically picks which product ID to include.
It checks several options in a set order and uses the first one that’s available.

**Order of priority (from highest to lowest):**

1. `variant_id`
2. `product_id`
3. `item_id`
4. `content_id`
5. `id`

This means if a `variant_id` exists in your tracking setup, it will be used as the product identifier in data deliveries to your analytics or ad platforms. If not, the system moves to `product_id`,
and so on down the list.

If you want to collect a different ID for example, always use `product_id` instead of `variant_id` you can change this in your **tracking setup**.
Just remove the higher-priority IDs (like `variant_id`) from what’s being collected. 
The system will then automatically fall back to the next one in the list.

This gives you control over whether you track specific product versions or just the main product.

Were you looking for something else? Read this article on [standard eCommerce event parameters](https://support.tracklution.com/kb/article/14/event-parameters#standard-ecommerce-parameters "https://support.tracklution.com/kb/article/14/event-parameters#standard-ecommerce-parameters").