A Request Page is a page that is executed at the beginning of a report. Its presence or absence is under developer control. A Request Page looks similar to the following screenshot, which is based on one of the standard system reports, the Customer - Order Detail report, Report 108:

There are three FastTabs in this page. The Customer and Sales Order Line FastTabs are tied to the data tables associated with this report. These FastTabs allow the user to define both data filters and Flow Filters to control the report processing. The Options FastTab exists because the software developer wanted to allow some additional user options for this report.