Gross Rating Points (GRPs)

GRPs express campaign weight as a single, comparable number. If a station has a 2.0 AQH Rating and an advertiser buys 10 spots, the schedule delivers 20 GRPs. Because GRPs combine audience size with ad frequency into one figure, they have been the dominant planning currency in television and radio for decades.

GRPs can exceed 100: a figure of 300 GRPs across a week simply means the campaign delivered total weight equivalent to reaching the entire market three times over, even though the actual unique Reach is much lower. GRPs split into Reach × Frequency: a 100 GRP buy might reach 50 percent of the market with an average frequency of 2, or reach 25 percent with a frequency of 4.