> ## Documentation Index
> Fetch the complete documentation index at: https://docs.landerlab.io/llms.txt
> Use this file to discover all available pages before exploring further.

# How to Pass Variant ID to ClickFlare from LanderLab

> Learn how to pass the variantId parameter from LanderLab to ClickFlare to track A/B test performance and analyze conversions by variant.

When running A/B tests in LanderLab, you can pass the active **variant ID** to ClickFlare to track performance per variant.

This allows you to see which variant is generating better results directly inside your tracking platform.

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## Important Requirement

This works **only if A/B testing is enabled and you have more than one variant active**.

If your landing page has only one variant, the `variantId` parameter will not be relevant.

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## How It Works

LanderLab automatically appends the `variantId` as a URL parameter.

You just need to make sure your tracking setup (ClickFlare, Voluum, RedTrack, etc.) is configured to capture it.

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## Step-by-Step Setup

### 1. Open Your Traffic Source in ClickFlare

* Go to your **Traffic Source settings**
* Locate the **Parameters** section

### 2. Add a New Parameter

Create a new parameter with:

* **Name:** `variantId`
* **TS Parameter:** `variantId`
* **TS Token:** `variantId` (or your platform equivalent)

This ensures ClickFlare captures the variant dynamically

### 3. Save Your Settings

* Click **Save**
* Your traffic source is now ready to receive variant data

<Frame>
  <img src="https://mintcdn.com/landerlab-babdc23f/h6CLD0qWCqL5lOE1/images/Group-85.png?fit=max&auto=format&n=h6CLD0qWCqL5lOE1&q=85&s=678b00faee1e6660de18058c465e876d" alt="Group 85" width="1818" height="1542" data-path="images/Group-85.png" />
</Frame>

## What Happens Next

When traffic hits your LanderLab page:

* The active variant (A, B, etc.) is automatically added to the URL
* ClickFlare captures it as `variantId`
* You can analyze performance by variant inside your tracker

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## Why This Is Useful

* Track conversions by variant
* Optimize campaigns based on real performance data
* Connect downstream events (calls, leads, sales) to specific variants

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## Important Notes

* No manual setup is needed inside LanderLab - the parameter is passed automatically
* You only need to configure your tracking platform to read it
* Works with any tracker that supports URL parameters