In Pivot, what field is used to define the vertical axis of the Pivot report?

The vertical axis of a Pivot report is defined using the "Group By" field. This option allows users to categorize or group data in a meaningful way, providing context for the data being analyzed. By selecting specific fields to "Group By," users can organize their reports effectively, facilitating clearer insights and trends.

The "Group By" function is essential in structuring the report, as it dictates how data will be displayed vertically and assists in comparing different categories or metrics side by side. This is particularly useful in Pivot reports where summarizing data in a structured format is crucial.

The other choices, while related, serve different purposes. "Pivot On" would refer to the main subject of the Pivot, "Data Field" pertains to the metrics or values being displayed, and "Report Axis" doesn't specifically define the function for organizing the vertical elements of the report.