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Google Analytics 4 is an analytics service that enables you to measure traffic and engagement across your websites and apps. This documentation provides implementation instructions and reference materials geared towards a developer audience.
Universal Analytics tracks screenviews in separate mobile-specific properties, whereas GA4 combines both web and app data in the same property. If you are tracking both web and app data in your GA4 property, be sure to take the additional app traffic into consideration when comparing pageview metrics between the two.
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