There are two types of data roles in Tableau – discrete and continuous dimension.

**Discrete data** roles are values that are counted as distinct and
separate and can only take individual values within a range. Examples: number
of threads in a sheet, customer name or row ID or State.

Discrete values are shown as blue pills on the shelves and blue icons in the data window.

**Continuous data** roles are used to measure continuous data and can
take on any value within a finite or infinite interval. Examples: unit price,
time and profit or order quantity.

Continuous variables behave in a similar way in that they can take on any value. Continuous values are shown as green pills.