A report is run against the data currently in Unified VRM each time you open the report.
For example, clicking the report name on the Infrastructure Vulns Reports page causes the report to run against the current data and to display the results.
You should manually run a report if you want to see the results of a report that you have created but not saved (e.g., if you just want to search), or if you have edited the filters in a report and not yet saved it. Simply click the Run Report button on the report page.
Tip! As you are building the report, take a look at the number next to the Run Report button. You can think of this number as a kind of preliminary result. This value is the number of vuln instances that Unified VRM has pulled based on the report filters so far. Be sure to click Run Report for a complete list of results.