There are two ways how you can add a Facebook pixel to your website:
Option 1
- Go for Settings and select Settings
- Switch to the tab Analytics
- Enter the Facebook Pixel Tracking ID
- Click on Apply
Option 2
- Go for Settings the select Pages
- Switch to the Scripts
- In the left-hand column select Standard (for all pages)
- Add the Facebook pixel code in the field Before </head> field
- Click on Apply