[GA4] Automatically collected events

Automatically collected events are triggered by basic interactions with your app and/or site (as indicated under the event name in the table below). As long as you use the SDK or gtag.js, you don't need to write any additional code to collect these events.

Analytics collects events for Android and iOS apps unless otherwise stated.

Note

The following parameters are collected by default with every event, including custom events:

• language
• page_location
• page_referrer
• page_title
• screen_resolution

Event name	Automatically triggered...	Parameters
ad_click (app)	when a user clicks an ad Publisher events coming from AdMob via the Google Mobile Ads SDK	ad_event_id
ad_exposure (app)	when at least one ad served by the Mobile Ads SDK is on screen	firebase_screen, firebase_screen_id, firebase_screen_class, exposure_time
ad_impression (app)	when a user sees an ad impression Publisher events coming from AdMob via the Google Mobile Ads SDK	ad_event_id
ad_query (app)	when an ad request is made by the Mobile Ads SDK	ad_event_id
ad_reward (app)	when a reward is granted by a rewarded ad served by the Mobile Ads SDK	ad_unit_id, reward_type, reward_value
adunit_exposure (app)	when an ad unit served by the Mobile Ads SDK is on screen	firebase_screen, firebase_screen_id, firebase_screen_class, exposure_time
app_clear_data (app)	when the user resets/clears the app data, removing all settings and sign-in data Android only
app_exception (app)	when the app crashes or throws an exception	fatal, timestamp, engagement_time_msec
app_remove (app)	when an application package is removed (uninstalled) from an Android device Android only This event is different from the Daily uninstalls by device and Daily uninstalls by user metrics, which are both reported by Google Play Developer Console. The app_remove event counts the removal of application packages, regardless of the installation source, and the count changes depending on the date range you are using for the report. The Daily uninstalls by device and Daily uninstalls by user metrics count the removal of application packages only when they were installed from Google Play, and are reported on a daily basis.
app_store_refund (app)	when an in-app purchase is refunded by Google Play Android only This event is not exported to BigQuery.	product_id, value, currency, quantity
app_store_ subscription_cancel (app)	when a paid subscription is cancelled in Google Play Android only Requires an initial subscription that was made on or after July 1, 2019. This event is not exported to BigQuery.	product_id, price, value, currency, cancellation_reason
app_store_ subscription_convert (app)	when a free-trial subscription is converted to a paid subscription This event is set as a default conversion. Requires an initial subscription that was made on or after July 1, 2019.An initial free-trial subscription is logged as an in_app_purchase with the subscription parameter set to true. This event is not exported to BigQuery.	product_id, price, value, currency, quantity
app_store_ subscription_renew (app)	when a paid subscription is renewed This event is set as a default conversion. Requires an initial subscription that was made on or after July 1, 2019. This event is not exported to BigQuery.	product_id, price, value, currency, quantity, renewal_count
app_update (app)	when the app is updated to a new version and launched again The previous app version id is passed as a parameter. This event is conceptually different from the Daily upgrades by device metric, which is reported by Google Play Developer Console. An upgrade refers to the updating of the application binary, whereas an app_update event is triggered upon the subsequent launch of the upgraded app.	previous_app_version
click (web)	each time a user clicks a link that leads away from the current domain Collected by default via enhanced measurement.	No parameters are collected
dynamic_link_app_open (app)	when a user re-opens the app via a dynamic link	source, medium, campaign, link_id, accept_time
dynamic_link_ app_update (app)	when the app is updated to a new version and is opened via a dynamic link Android only	source, medium, campaign, link_id, accept_time
dynamic_link_ first_open (app)	when a user opens the app for the first time via a dynamic link	source, medium, campaign, link_id, accept_time
error (app)	logged in place of an event that can't be logged because it is invalid in some way _err (firebase_error), _ev (firebase_error_value), and _el (firebase_error_length) parameters have additional information.	firebase_error, firebase_error_value
file_download (web)	when a user clicks a link leading to a file (with a common file extension) of the following types: document text executable presentation compressed file video audio File extensions that match the following regex will trigger the event: pdf|xlsx?|docx?|txt|rtf|csv|exe|key|pp(s|t|tx)|7z|pkg|rar|gz|zip|avi|mov|mp4|mpe?g|wmv|midi?|mp3|wav|wma This event is collected by default via enhanced measurement.	file_extension, file_name link_classes, link_domain, link_id, link_text, link_url
firebase_campaign (app)	when the app is launched with campaign parameters	source, medium, campaign, term, content, gclid, aclid, cp1, anid, click_timestamp, campaign_info_source
firebase_in_app_ message_action (app)	when a user takes action on a Firebase In-App Message	message_name, message_device_time, message_id
firebase_in_app_ message_dismiss (app)	when a user dismisses a Firebase In-App Message	message_name, message_device_time, message_id
firebase_in_app_ message_impression (app)	when a user sees a Firebase In-App Message	message_name, message_device_time, message_id
first_open (app)	the first time a user launches an app after installing or re-installing it This event is not triggered when a user downloads the app onto a device, but instead when he or she first uses it. To see raw download numbers, look in Google Play Developer Console or in iTunesConnect. Supports measuring first_open conversions for users who accept Apple's iOS 14 app-tracking prompt.	previous_gmp_app_id, updated_with_analytics, previous_first_open_count, system_app, system_app_update, deferred_analytics_collection, reset_analytics_cause, engagement_time_msec
first_visit (app, web)	the first time a user visits a website or launches an Android instant app with Analytics enabled
in_app_purchase (app)	when a user completes an in-app purchase, including an initial subscription, that is processed by the App Store on iTunes or by Google Play The product ID, product name, currency, and quantity are passed as parameters. To see in_app_purchase data for Android apps, you need to link Analytics to Google Play. Analytics supports automatic subscription tracking on Android and iOS. This event is triggered only by versions of your app that include the Firebase SDK. Note: paid-app purchase revenue and refunds (iOS only) are not automatically tracked. Your reported revenue may differ from the values you see in the Google Play Developer Console. Events that are flagged as being invalid or as sandbox (test) are ignored. Only iOS events are flagged as sandbox. Learn more about testing Google Play billing.	product_id, price, value, currency, quantity, subscription, free_trial, introductory_price
notification_dismiss (app)	when a user dismisses a notification sent by FCM Android only	message_name, message_time, message_device_time, message_id, topic, label, message_channel
notification_foreground (app)	when a notification sent by FCM is received while the app is in the foreground	message_name, message_time, message_device_time, message_id, topic, label, message_channel, message_type
notification_open (app)	when a user opens a notification sent by FCM	message_name, message_time, message_device_time, message_id, topic, label, message_channel
notification_receive (app)	when a notification sent by FCM is received by a device when the app is in the background Android only	message_name, message_time, message_device_time, message_id, topic, label, message_channel, message_type
notification_send (app)	when a notification is sent by FCM Android only	message_name, message_time, message_device_time, message_id, topic, label, message_channel
os_update (app)	when the device operating system is updated to a new version. The previous operating system version id is passed as a parameter	previous_os_version
page_view (web)	each time the page loads or the browser history state is changed by the active site Collected by default via enhanced measurement.	page_location (page URL), page_referrer (previous page URL)
screen_view (app)	when a screen transition occurs and any of the following criteria are met: No screen was previously set The new screen name differs from the previous screen name The new screen-class name differs from the previous screen-class name The new screen id differs from the previous screen id	firebase_screen, firebase_screen_class, firebase_screen_id, firebase_previous_screen, firebase_previous_class, firebase_previous_id, engagement_time_msec
scroll (web)	the first time a user reaches the bottom of each page (i.e., when a 90% vertical depth becomes visible) Collected by default via enhanced measurement.	engagement_time_msec
session_start (app, web)	when a user engages the app or website
user_engagement (app, web)	periodically, while the app is in the foreground or the webpage is in focus	engagement_time_msec
video_complete (web)	when the video ends For embedded YouTube videos that have JS API support enabled. Collected by default via enhanced measurement.	video_current_time, video_duration, video_percent, video_provider, video_title, video_url, visible (boolean)
video_progress (web)	when the video progresses past 10%, 25%, 50%, and 75% duration time For embedded YouTube videos that have JS API support enabled. Collected by default via enhanced measurement.	video_current_time, video_duration, video_percent, video_provider, video_title, video_url, visible (boolean)
video_start (web)	when the video starts playing For embedded YouTube videos that have JS API support enabled. Collected by default via enhanced measurement.	video_current_time, video_duration, video_percent, video_provider, video_title, video_url, visible (boolean)
view_search_results (web)	each time a user performs a site search, indicated by the presence of a URL query parameter Collected by default via enhanced measurement.	search_term, optionally ‘q_<additional key="">’ (where <additional key=""> matches an additional query parameter you specify to be collected under advanced settings)