An event is the user’s interaction/activity with a web page element embedded on a website and/or mobile app.

There are four categories of events in Google Analytics 4:

1. Automatically Collected Events
2. Enhanced Measurement Events
3. Recommended Events
4. Custom Events

Enhanced Measurement Events are automatically triggered and logged on certain pre-defined user activities. But the events (excluding ‘page_view’ event) are logged only when you have enabled enhanced measurement in Google Analytics 4. 

Following are the examples of enhanced measurement events and their corresponding parameters:

page_view

This event is triggered each time a web page loads in a browser window.

scroll

This event is triggered when the first time a user scrolls 90% of a web page.

click

This event is triggered each time a user clicks on an external link.

You can supply additional information with this event by using the following event parameters: link_classes, link_domain, link_id, link_url, outbound (boolean)

view_search_results

This event is triggered each time a user performs a search on your website.

video_start

This event is triggered when a user starts playing an embedded YouTube video.

For supplying additional information use the following event parameters: video_current_time, video_duration, video_percent, video_provider etc.

video_progress

This event is triggered when the user progress through an embedded YouTube video.

For supplying additional information use the following parameters: video_current_time, video_duration, video_percent, video_provider etc.

video_complete

This event is triggered when a user completes watching an embedded YouTube video.

For supplying additional information use the following parameters: video_current_time, video_duration, video_percent, video_provider etc.

file_download

This event is triggered when a user clicks a link to a file.

For supplying additional information use the following parameters: file_extension, file_name, link_classes, link_domain, link_id etc.

Note: You don’t need to add any code or tag on your website in order to track enhanced measurement events.

Check out the official help documentation to learn more about the enhanced measurement events and the parameters each event support: https://support.google.com/analytics/answer/9216061 

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To find the list of all the enhanced measurement events recorded in your GA4 reporting view, follow the steps below:

Step-1: Navigate to your GA4 reporting view.

Step-2: Click on ‘Events‘ under ‘Engagement‘:

You should now be able to see the list of all the enhanced measurement events recorded in your GA4 view so far:

Another place to see the list of all the enhanced measurement events is by navigating to the ‘All events’ report:

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