Google’s Universal Analytics (known as ‘Google Analytics’) has now been replaced by Google Analytics 4 (known as GA4).

• GA4 is now Google’s primary analytics platform.
• Google stopped adding and analysing data on Universal Analytics on July 1, 2023.
• On July 1, 2024, all users, including those using GA 360, will lose access to all Universal Analytics properties.
  
  

GA4's primary benefit is that it uses enhanced User-Centric Tracking

GA4 shifts your analytics from a session-centric model to a user-centric model. This means it provides a more comprehensive view of user (customer, prospect or visitor) interactions across your devices and platforms, allowing you to better understand user behaviour throughout the entire customer journey.

(The upgrade you may have made in 2023 from Universal Analytics to GA4)