Gross Rating Point

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GRP (short for Gross Rating Point) is an acronym used in advertising to measure the size of an audience reached by a specific media vehicle or schedule. It is a sum of ratings points per spot placed in a given schedule over a specified period of time.

For example, an advertiser places an advertisement in a show that garners a 2.0 rating point in any given demographic universe times 50 spots that ran in that show will achieve a gross rating point of 100 for that advertiser.