<p>Facebook pixel makes conversion tracking, optimization and remarketing easier than ever. The Facebook pixel ID is usually composed of 16 digits. Please make sure to add the correct value otherwise events will not be tracked!</p> <p><code>e.g. 1234567890123456</code></p><p><a href="https://www.facebook.com/business/a/facebook-pixel" target="_blank">Learn more</a></p>