Discrete (blue) fields have values that are shown as distinct and separate from one another. Discrete values can be reordered and still make sense. For example, you could easily rearrange the values of Region to be East, South, West, and Central, instead of the default order in the preceding screenshot.

When a discrete field is used on the Rows or Columns shelves, the field defines headers. Here, the discrete field Region defines column headers:

Here, it defines row headers:

When used for color, a Discrete field defines a discrete color palette in which each color aligns with a distinct value of the field: