Segments are subsets of a website or web application's data that can isolate and analyze specific groups of users or sessions. For example, you can create a segment to only include data from users who use a certain device or have completed a purchase on their e-commerce site.
Segments can implement a wide range of criteria, including demographic information, geographic location, behavior on your site, and many other factors. Once a segment has been created, it can be applied to any report in Google Analytics.
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