What goes in the Rows and Columns of an Explore query?
The Rows and Columns section in query builder is a place where you can add attributes to your report. Attributes help you get more detailed information about the data you're looking at. Which types of attributes go where depends on the type of report you are creating.
If you are creating a table, attributes you want to show up as column headers, put in Columns, and attributes you want to show up as row headers put in Rows. When you create a bar, column, or line type visualizations, the attribute you put in the Columns section dictates the X-axis of the chart. The attribute you put in the Rows section splits the data into additional, differently colored, rows, columns, or lines.
As you move into more unique visualizations such as Word cloud or Picto, the Row Selector becomes more prominent. The Row Selector allows you to select and focus on different parts of the row attributes.
Learn more about parts of a query and types of visualizations in these articles: