When an action on your website occurs, your Facebook pixel logs it as an "event". You can use events to track conversions, optimise for conversions and build audiences by adding the appropriate code to your website.

There are two categories of events: standard and custom.

Standard events are actions that we recognise and support across ad products. For example, you can leverage standard events in catalogue sales ads and Facebook pixel website click ads.

Custom events are actions that fall outside of those covered by our standard events. You can create and use them when you want to track something non-standard.

Note: To optimise for or track a custom event, make sure that you define it as an event-based custom conversion first. Learn more about custom conversions.

* Nguồn: Facebook