The Advertising Unit Definitions service stores the data that defines how to calculate the number of units for the Ad Caption text listed on an insertion order for a classified advertisement. The Aptify Advertising module includes support for three standard unit types: characters, words, and lines. An organization can use one of these three predefined unit definition types if they wish to calculate the price of the text based on either the number of words, number of characters or number of lines in the ad caption text.
...