
Out-of-home advertisements are a very effective marketing medium, but how do you quantify the impact of traditional media ads? The industry developed a system to determine an ad’s effectiveness. Today’s blog post will give a quick and succinct explanation of both GRP and TRP.
The first term we need to define is impression. In OOH, impressions are the number of times people are likely to notice an OOH ad. How are these impressions determined? In the OOH industry, the standard for measuring is Geopath. Geopath is a “not-for-profit organization governed by a tripartite board comprised of advertisers, agencies, and media companies.” They use a variety of means to provide the most accurate impression data related to OOH. Once we have the impression data, we can accurately figure out the GRP.
GRP (Gross Rating Point)
GRP, or gross rating points, are a standard measure in advertising used to measure exposure. GRP is the total number of impressions delivered by an ad schedule expressed as a percentage of a market population. In other words, it’s all adults aged 18+. It refers to the percent of the total viewing audience reached multiplied by the exposure frequency. This score is commonly considered to be the primary analytic currency for OOH, but it is also used when planning and buying other types of media. For example, GRP would be used when promoting the upcoming census since they’re trying to reach everyone.
The formula used to calculate the GRP is:
(Reach (% of Audience Reached) × Frequency (# of ad impressions)) × 100
So if 30 percent of the viewing audience sees your billboard 4 times, that ad would have a GRP of 120 ((.3 × 4) × 100).
TRP (Target Rating Point)
Using GRP works well when you’re trying to reach all adults 18+, but in cases where your target is more narrow, it may be more valuable to use TRP. TRP, or Target Rating Point, enables you to determine the number of GRP’s achieved by an advertisement among targeted individuals within the larger viewing population. The calculation is actually rather simple.
The formula used to calculate the TRP is:
GRP × Target Audience as a Percent of Entire Viewing Audience
Going off the earlier example, assume you are targeting males ages 18-25. If you know that this demographic makes up 35 percent of your entire viewing audience your new TRP would be 42 (120 × 35).
That’s all there is to it! Figuring out GRP and TRP isn’t all that scary, after all. We also have tools that can easily calculate TRP and GRP for you. Want to learn more? Feel free to request a demo.
If you’ve ever been to a live sporting event then you probably know that when your attention is not on the field (court, rink, pitch, etc.) it’s probably focused on the Jumbotron instead. These massive digital video boards are commonplace in almost every sports venue and are a premier location for your OOH advertisement.
Branded signage is another very common and effective stadium ad format. These signs or posters are placed in concourses, stairwells, elevators, and even parking structures. Despite being relatively conventional in nature you can be sure these ads will reach the hoards of fans who roam the stadium looking for their seats, restrooms, and concession stands.
Branded seating is another productive form of stadium advertising that makes an impact the moment fans take their seats. Seat advertisements refer to branded giveaway bags, containing a variety of goods and information, that are affixed to the backs of fans’ seats before the start of the game. Placing these ads at one of the fans’ first points of contact with the stadium makes your brand stand out, and immediately prompts users to engage with your offering. By investing in seating advertisements you place your brand directly at the fingertips of consumers and encourage continual interaction both during and after the game. 








