Exposure Advertising In Focus
The Nexus Group developed Exposure Minutes and Time-Weighted CPM (TW-CPM) to evaluate advertising environments where customers spend meaningful time near an advertisement. Rather than measuring exposure solely by estimated impressions, Exposure Minutes combine estimated monthly customer traffic with average customer dwell time to estimate the cumulative opportunity for advertising exposure within a location.
This methodology is intended to provide a transparent, standardized, and conservative framework for comparing long-duration advertising environments. It measures exposure opportunity, not verified visual attention, and should be considered alongside other campaign objectives and performance metrics.
The sections below describe the methodology, assumptions, data sources, limitations, and intended scope of the metric.
Measurement Philosophy
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Measure exposure opportunity rather than claim attention.
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Use conservative assumptions where reasonable.
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Apply a consistent methodology across all locations.
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Favor reproducibility over optimistic estimates.
Inputs
○ Public traffic research
○ Audience research
○ Dwell time
○ Venue characteristics
○ Internal campaign data
○ Industry benchmarks
Limitations
○ Exposure minutes cannot determine if an
individual noticed an advertisement
○ Seasonal fluctuations may affect estimates.
○ Individual campaign creativity may impact
effectiveness.
○ Customer behavior varies by venue.
Assumptions
○ Customer dwell time represents average visit duration.
○ Exposure minutes estimate opportunity for exposure, not confirmed viewing.
○ Estimates represent average operating conditions.
○ Advertisements remain continuously displayed during business hours.
○ Traffic and dwell estimates are periodically updated.
Validation
The Nexus Group periodically compares estimated exposure minutes with campaign performance metrics and refines assumptions as additional campaign data becomes available.
Comparison
○ Traditional CPM (Impression based)
○ Exposure minutes (Time based)
○ TW-CPM (Price normalized by exposure minutes)
Conservative Design
Our methodology intentionally avoids maximizing reported impressions. Instead, it emphasizes consistent and conservative estimates intended to provide advertisers with a transparent basis for evaluating long-duration advertising environments.
Update Policy
Methodologies are periodically reviewed as additional campaign data, traffic information, and industry research become available.
Standardized Comparison
Traditional advertising channels generally publish metrics using their own measurement frameworks, such as impressions, CPM, reach, or other platform-specific statistics. They do not typically publish Exposure Minutes or Time-Weighted CPM (TW-CPM). To enable meaningful comparisons across advertising environments, Nexus converts publicly available or industry-standard metrics into the Exposure Minutes and TW-CPM framework using a standardized methodology. This creates a common measurement yardstick that allows advertisers to compare advertising environments using a consistent time-based metric.
Traditional CPM
Primary Measurement: Impressions
Traditional CPM measures the cost to deliver one thousand estimated impressions.
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Each qualifying impression is weighted equally.
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Time spent in the advertising environment is not reflected in the metric.
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Commonly used for digital, television, radio, outdoor, and other impression-based advertising channels.
Exposure Minutes
Primary Measurement: Exposure Opportunity
Exposure Minutes estimate the cumulative amount of time customers spend within the advertising environment by combining estimated monthly foot traffic with average customer dwell time.
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Incorporates customer dwell time.
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Designed for environments where customers remain near an advertisement for extended periods. Estimates exposure opportunity rather than verified visual attention.
Time-Weighted CPM (TW-CPM)
Primary Measurement: Cost per Exposure Minute
TW-CPM normalizes advertising cost using Exposure Minutes rather than impressions.
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Allows price comparisons using a time-based measurement.
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Provides a standardized metric for comparing long-duration advertising environments.
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Complements, rather than replaces, traditional CPM.