columns (fields) created using out-of-the-box column types
Columns, either at list or site level, created using out-of-the-box column types.
A column type determines how data is stored and displayed in a list or library. When you create a column for a list or library, you choose a column type that indicates the type of data that you want to store in the column such as numbers only, formatted text, or a number that is calculated automatically. Columns are then added to one or more views of the list or library to help you display the data in a meaningful way. You can read more about field types in sharepoint, here.
Use this tag for columns created from the UI or via code.