01
Write the question first
Every event should answer a real question about acquisition, behaviour or progression. For example: which source creates contactable enquiries, where do visitors abandon a booking flow, or which content contributes before an application? A measurement plan that starts with questions prevents a long list of events that nobody uses when the team has to make a decision.
02
Separate intent from success
A form start, phone click, form submit, accepted enquiry and sale are different moments. Keep them distinct so optimisation does not reward a convenient but low-quality action. Define the trigger, owner, expected volume, parameters, consent conditions and validation approach for each important event. This gives developers, analysts and campaign managers one shared implementation brief.
03
Test the whole chain
Verification needs to continue past the browser request. Check the data layer, tag trigger, analytics receipt, reporting view and downstream destination, then compare a small sample against the source system. Record what was tested, when and by whom. Re-test after material changes to forms, consent tooling, checkout flows or CRM integrations because a valid event plan is an operating process, not a one-time task.
Primary references
External documentation can change. Verify implementation details against the linked official source before deployment.