SSRS Tutorial

A report has a header, a body, and a footer. A report also has a default page size with page headers and page footers. You can place report items such as images, text boxes, and lines in headers and footers. The body of the report contains the report data. You can place any type of report item in the body, including tables, matrices, lists, charts, and gauges. You link report data to report items on the design surface. When the report is processed, the report data and layout items are combined. When you view the report, the combined data and layout elements are sent to a report renderer. The renderer dynamically determines how much data fits on each page. Report parameters are used to specify the data to use in a report, connect related reports together, and vary report presentation.

MSDN: SSRS Tutorial