Facebook Ad Pixel added to a page

Hi.

Please check this link for a quick info.: https://www.facebook.com/business/a/online-sales/conversion-tracking?campaign_id=579705038731764&placement=OnlineAdvCPInt

I would like to place a Facebook pixel on my EasySocial registration page. The page that displayed when there is a successful registration.

Please let me know how to do this.