The RUM Time Series report lets you see, for the URL you select, what a typical end-user experiences when they visit your RUM-enabled site. For the dimension(s) you choose, this report can display an individual metric or a group of metrics. The legend, at the bottom of the report, displays the selected statistical calculation (Median, 90th percentile, or both).
The main purpose of the time series graph is to identify patterns and trends over time.
For details on selecting filters to generate and view your Time Series report, see Working with Your Time Series Report.