Summary
It highlights the event as important for understanding user behaviour in standard reports. The event was already firing and already being stored, so nothing changes about collection. Marking it as key adds it to the Key events report and puts a Key events column next to traffic data in reports like Traffic acquisition and Landing page.
Nitin Batra is a Google Analytics 4 certified professional who configures key events, event modifications and Google Ads conversion imports across client GA4 properties.
Last updated: August 16, 2026
Marking newsletter_signup as a key event highlights it as an important action in GA4’s standard reports, so it appears in the Key events report and the key events metric across acquisition and engagement reporting.
- It creates a new, custom event that’s specific to the business.
- It ensures the interaction is processed and stored by the platform.
- It makes the event data available for ad campaign bidding strategies.
- It highlights the event as important for understanding user behavior in standard reports.
The correct answer is: It highlights the event as important for understanding user behavior in standard reports.
Key Takeaways
- – Marking newsletter_signup as a key event highlights it as important for understanding user behaviour in standard reports.
- – The toggle sits in Admin, Data display, Events, and the event then appears in the Key events report and as a Key events column in acquisition and engagement reports.
- – Key events replaced conversions in GA4 reporting, so the same idea now separates measurement reporting from Google Ads bidding.
- – Marking an event as key is not retrospective, so GA4 only counts key events from the moment you turn the toggle on, and the event must have fired at least once to appear in the list.
Does marking an event as a key event change how GA4 collects the data?
No. Collection and storage happen the moment the event fires and reaches the property, whether or not it is marked as key. The key event setting only affects reporting, by adding the event to the key events metric and the Key events report. If the tag was broken, marking it as key would fix nothing.
Where exactly do I mark newsletter_signup as a key event?
Go to Admin, then Data display, then Events. Find newsletter_signup in the list of existing events and switch on the Mark as key event toggle. If the event has not fired in the last 30 days it will not appear there, in which case you create it first using Create event or fix the tag, then come back and toggle it.
What is the difference between key events and conversions in GA4 now?
Google renamed conversions to key events inside Analytics reporting in 2024. Key events are what you analyse in GA4 standard reports, while conversions is now the term reserved for the actions imported into Google Ads for bidding and optimisation. Marking an event as key in GA4 does not automatically make it a Google Ads conversion, that still needs the Google Ads link and an import step.
How many key events can I mark in one GA4 property?
A standard GA4 property allows up to 30 key events. That limit is a good reason to be selective and mark only the actions that reflect real business outcomes, such as newsletter_signup, purchase, generate_lead or a demo booking. Filling the list with minor clicks makes the key events metric noisy and harder to trust.