A pivot report is among the underrated and underused powerful feature of Excel. So I want to give some lights onto its importance because this is really helpful, not only to the end users, but also to the developers.
What is a Pivot Table?
In data processing, a pivot table is a data summarization tool found in data visualization programs such as spreadsheets or business intelligence software. Among other functions, pivot-table can automatically sort, count, total or give the average of the data stored in one table or spreadsheet. It displays the results in a second table (called a "pivot table") showing the summarized data. Pivot tables are also useful for quickly creating unweighted cross tabulations. The user sets up and changes the summary's structure by dragging and dropping fields graphically. This "rotation" or pivoting of the summary table gives the concept its name.
- wikipedia