Use this tag with questions about implementing Google Analytics 4, successor of Google's Universal Analytics. Use with the [google-analytics] tag. Questions related to Google Analytics 4 user interface should be submitted to webapps.stackexchange.com.
Google Analytics 4 Properties (GA4), formerly App + Web, are an updated version of Google Analytics tracking. While there are some similarities between Google Analytics 4 Properties and the default Universal Analytics properties widely in use today, Google Analytics 4 Properties uses an event-driven data model and steps away from many aspects of Universal Analytics such as its hierarchical event structure and focus on session metrics and session-scoped data.
Google Analytics 4 Properties are built on two existing Google product platforms: Google Cloud Platform (GCP) and Firebase. Google Cloud Platform (GCP) is a huge suite of tools centered around things like data storage and computing, machine learning, and networking, among many other things. Firebase is a mobile development platform.
Though Google Analytics 4 Properties is built on Firebase, Google Analytics 4 Properties and the data it collects live in Google Analytics (GA).