Here is some PivotTable lingo that you need to know before you work with pivot tables.
Item— An item label is a subcategory of a PivotTable field and is derived from unique entries in a database field or in a list column. Items appear as row or column labels or in the lists for page fields in a pivot table report.
Row field— Row field labels have a row orientation in a pivot table report and are displayed as row labels. Appears in the ROW area of a pivot table report layout.
Column field— Column field labels have a column orientation in a pivot table report and are displayed as column labels. Appears in the COLUMN area of a pivot table report layout.
Data field— Data fields from a list or table contain summary data ...