Google Tag Manager (GTM) is a tag management system created by Google that allows marketers and website owners to add and manage marketing and analytics tags (snippets of code) on their websites without needing to modify the site's code. With GTM, users can easily add and update tags for a wide range of marketing and analytics tools, including Google Analytics.
Google Analytics (GA) is a web analytics service provided by Google that tracks and reports website traffic. It provides valuable insights into user behavior, demographics, and the effectiveness of marketing campaigns. GA tracks various metrics, including the number of visitors, their geographic location, the pages they visit, the time they spend on the site, and much more. GA can help businesses make data-driven decisions and optimize their websites for better user experiences and higher conversions.
GA4 is the latest version of Google Analytics that was launched in October 2020. It is an updated and more advanced version of the previous Universal Analytics (UA). GA4 uses a new data model and has several new features, including cross-device tracking, enhanced tracking of events, improved user acquisition reporting, and more. GA4 is designed to help businesses gain a better understanding of their customers and make better decisions based on their behavior across multiple devices and platforms.