A rating point is defined as the reach of a media vehicle as a percentage of a defined population. 
For example, a television show with a rating of 2 reaches 2% of the population.
- ^ Farris, Paul W.; Neil T. Bendle; Phillip E. Pfeifer; and David J. Reibstein (2010). Marketing Metrics: The Definitive Guide to Measuring Marketing Performance (Second Edition). Upper Saddle River, New Jersey: Pearson Education, Inc.