What are dimensions and metrics in Google Analytics?

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Google Analytics does not present you with the raw data collected by the platform. It first processes the data and then generates reports. The first phase of data processing is separation by users and sessions.

User data: This is data about different visitors to your site. Google Analytics creates a unique, random user ID for each new visitor to your site. If the same user returns to your website in the future, Analytics recognizes the user ID, which will then be referred to as a "returning" visitor; this association only works if the user visits the site from the same device. The process can be reversed if the user clears cookies from the browser cache.

Session data: A session is a period of time that a user spends on your site. It begins with a pageview hit when the user first visits your website and continues until they leave the site. During each session, Analytics collects usages of car owner database different types of session data. Dimensions: These are the basic attributes of the data collected. "Country", for example, is a dimension that can be provided for user data. It will tell you what countries your site users come from.

Metrics: Quantitative measurements; they tell you the total number of something. The "Sessions" metric, for example, tells you how many sessions occurred on your site in a given time period.

Google Analytics creates a number of predefined reports. We’ll look at many of them later. You can also create custom reports that combine different dimensions and metrics.

Not all dimensions and metrics can be combined in a report. Each of them has what is known as a "scope", which is the level at which its data is collected. The different scopes are "User Level", "Session Level", and "Hit Level". You can only combine dimensions and metrics from the same scope.