What is the Difference between GA4 vs Universal Analytics?

The main difference between GA4 and Universal Analytics is in the way data is collected and processed. GA4 uses an event-based data collection system, whereas Universal Analytics relies on the traditional pageview-based data collection system. This difference means that GA4 is able to capture more detailed interactions, while Universal Analytics’ pageview-based analytics are limited to pageviews and page-level metrics. Additionally, GA4 also introduces machine learning capabilities such as prediction and anomaly detection that are not available in Universal Analytics.