You create a report to show the types of devices users have been coming from over the past 30 days — whether they were on computers or mobile phones, for example. In this report, which of these is a “metric” in Google Analytics?
Explanation:
In the context of Google Analytics, a “metric” is a quantitative measurement of data. It represents the numerical value that measures some aspect of user behavior. For instance, metrics include data points such as the number of users, sessions, page views, bounce rate, and average session duration. Given the options provided for the report showing the types of devices users have been coming from over the past 30 days, the correct metric is: **How many users were on mobile phones**. This option represents a specific numerical value that quantifies user behavior, specifically the number of users who accessed the site via mobile phones. Metrics in Google Analytics are always about quantifiable data that can be counted or measured, making “How many users were on mobile phones” a clear example of a metric. The other options describe dimensions or settings, such as the types of devices (dimensions), the sources of traffic (dimensions), and the date range setting (a configuration, not a metric).
Metrics are quantitative measurements. The metric Sessions is the total number of sessions. The metric Pages/Session is the average number of pages viewed per session.
user metrics are calculated in two basic ways:
As overview totals
where the metric is displayed as a summary statistic for your entire site, such as bounce rate or total pageviews.
In association with one or more reporting dimensions
where the metric value is qualified by selected dimension(s).
Read more here: https://support.google.com/analytics/answer/1033861