Facebook pixel is code that you place on your website that collects data that helps you track conversions from Facebook ads, optimize ads, build targeted audiences for future ads, and remarket to people who have already taken some kind of action on your website. It works by placing and triggering cookies to track users as they interact with your website and your Facebook ads.
In order to get your Facebook Pixel code, follow the instructions on the Facebook business page. Next, go to the "Site Settings" section of your OfferingTree website, click on "Integrations" tab and click "Add code to HEAD".
Give the integration a name, such as "Facebook Pixel" and paste the code into the "Integration code" section. Hit "Save". Facebook will then be able to verify that you own your OfferingTree site and link it to your Facebook business account.
After setting up, you can use Meta Fixer Helper Chrome Plug in to help you find out if your Meta Pixel is working correctly.
You can use this help article from Meta on how to use this plug-in.