What is the basic unit of sale for billboards or posters?

Question

Quizplus · Accepted Answer

The basic unit of sale for billboards or posters is 100 showing, which refers to the number of times the advertisement is displayed to viewers. This is the measure of how many times the ad is shown, but not necessarily how many people see it (reach) or how often they see it (frequency). Quarterly reach, monthly CPP, and share of market are not relevant measures in this context. Target audience frequency may be relevant, but it is not the basic unit of sale.

What Is the Basic Unit of Sale for Billboards or Posters