The name of the column in the marker list that stores the marker descriptor value. The list can contain a column to store this value or you can use the address column.
For example, if your list has addresses, you can use the address column: '1000 5th Ave, New York, NY 10028, USA' or add a column that has 'Metropolitan Museum of New York'.
Commas in addresses are replaced with line breaks so that:
1000 5th Ave, New York, NY 10028, USA
1000 5th Ave
The name of a text column in the marker list.