Google Analytics 4 (GA4) is the latest version of GA that is expected to replace standard GA (universal analytics) in the long run. GA4 has several differences that you should be aware of. It can handle both websites and mobile apps, it offers an API to Google Cloud (which is good because you can only keep data in GA4 for 13 months unlike regular ones which have several options for data retention), it comes with a number of features and events preconfigured already such as Enhanced measurement events and Automatically collected events.