Google Analytics - UA vs GA4

Event Tracking 

In Universal Analytics, events are user interactions measured independently from a web page or screen load. Downloads, link clicks, form submissions, and video plays are often measured as events. Events in Universal Analytics have a Category, Action, Label and sometimes a Value, and are displayed with these fields in your Analytics reports.

In Google Analytics 4 properties, events are user interactions with a website or app that can be measured concurrently or independently from a webpage/screen load. Examples of events include page views, button clicks, user actions, and system events.

Combine Web and App Data

The Data from Web and App can be tracked, viewed and managed in the same platform.

GA4 provides the ability to rollup both mobile and web data 

Engaged Sessions 

Everything is Session Based in GA4. There is no Bounce Rate in GA4, We have 3 Engagement KPIs- Engagement Rate, Engaged Sessions per use and Engagement Time.

Engagement Rate is the inverse of Bounce RateFor example, the average website bounce rate for all industries is around 47%. We would expect to see a 53% engagement rate after the switch to Engagement Rate.