There are 3 WF webhooks : Watch Events, Fields and records, respectively.
A record = business object that is tracked
A field = specific field on a record
Event - any change/create/delete event on tracked objects.
They each have slightly different option, best to play with each one. The main difference is that the Watch Record/Field hooks only function by polling the accumulated events. They are never instant.
The filtering on the Instant trigger is annoying because the UI doesn't support OR filters. The other modules are - annoying because you get to type in the text-mode filter yourself - but that also gives you some freedom.
Fusion/Workfront set up the event subscriptions automagically under the hood. You just put the trigger module in, and configure filters etc. then continue processing.
Note: I would always set the "max events" to 1 - in some weird cases Fusion got duplicates (very rare - but baffling)
