In Google Analytics, a metric is a quantitative measurement of data that tells you how some aspect of your business performed during a specific timeframe. Metrics are often paired with dimensions, which are criteria that the metrics are measured against. For example, the "Users" metric shows the number of users that visited your website in a given time frame, while the "Pages/Session" metric shows the average number of pages viewed per session. Other commonly tracked metrics in Google Analytics include sessions, bounce rate, new users, page views, and conversion rate. Metrics are organized into columns in most Analytics reports, while dimensions are organized into rows. In short, metrics are the numbers in a data set that help you analyze site performance.