The Facebook Pixel Helper is a troubleshooting tool that helps you validate your pixel implementation.The Facebook Pixel Helper works in the background to look for conversion or Facebook pixels and provide realtime feedback on the implementation. A small number will appear on the Facebook Pixel Helper icon to indicate number of pixel events. When clicked, a panel will expand to show a detailed overview of the page's pixels, including warnings, errors and successes. Learn more about using Facebook pixels here: https://developers.facebook.com/docs/marketing-api/facebook-pixel