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Tracking with the Meta Pixel | Developer Documentation

Tracking with the Meta Pixel

Updated: Nov 4, 2025
The Meta Pixel is a snippet of JavaScript code that allows you to track visitor activity on your website. It works by loading a small library of functions that you can use whenever a site visitor takes an action (i.e., an event) that you want to track; this is called a conversion.
Embedding the Meta Pixel is a feature that lets you know how many visitors to a given page have clicked on the embedded signup button. This can help you understand how many people considered WhatsApp and how many successfully converted.
Make sure the initial code setup triggers a Pageview event with your Facebook app ID and the feature parameter.

Example

<!-- Meta Pixel Code --><script>!function(f,b,e,v,n,t,s){if(f.fbq)return;n=f.fbq=function(){n.callMethod?
  n.callMethod.apply(n,arguments):n.queue.push(arguments)};if(!f._fbq)f._fbq=n;n.push=n;n.loaded=!0;n.version='2.0';
  n.queue=[];t=b.createElement(e);t.async=!0;
  t.src=v;s=b.getElementsByTagName(e)[0];
  s.parentNode.insertBefore(t,s)}(window, document,'script','https://connect.facebook.net/en_US/fbevents.js');
  fbq('init','<i>your-pixel-id</i>');
  fbq('track','PageView',{appId:'<i>your-facebook-app-id</i>', feature:'whatsapp_embedded_signup'});</script><noscript>
  <img height="1" width="1" style="display:none" src="https://www.facebook.com/tr?id=<i>your-pixel-id</i>&ev=PageView&noscript=1"/>
</noscript><!-- End Meta Code -->

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