I installed the Facebook pixel on my website to provide more options when using Facebook ads. I also added the standard event to my thank you pages so they would be tracked in Facebook reports. Any example is:

<script>
  fbq('track', 'Lead');
</script>

I learned about the option to also add parameters so the different standard events could be grouped further. The syntax is:

<script>
  fbq('track', 'Lead', {content_name: 'ThankYouPage'});
</script>

Resources: