The fundamental trade-off in TV takes place between coverage and frequency. At a constant budget, increasing frequency mechanically reduces coverage.
Effectiveness studies converge on one point: for most awareness campaigns, it is better to maximize coverage up to a frequency of 3 to 5 rather than over-exposing a fraction of the target audience to 10 or 15 contacts. The untouched fraction generates zero results. The over-exposed fraction can generate fatigue.
Orders of magnitude commonly used in TV branding: 100 to 200 GRPs per week to maintain a presence, 300 to 500 GRPs during a peak period or a launch. These figures vary considerably depending on the sector, initial brand awareness, and the competitive intensity of the market.
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Frequency capping in digital: control at the individual level
Digital offers what TV cannot provide: control of frequency at the individual level. Frequency capping consists of setting a maximum number of impressions per user over a defined period: 3 impressions per day, 10 per week, 20 over the duration of the campaign.
This is a powerful lever, often underutilized. Many advertisers launch a display or social campaign without setting a cap, letting the algorithm expose the same individuals dozens of times. The result: click-through rates that collapse on late exposures, signs of irritation (ad hiding, unfollows), and a budget wasted on people who will not convert.
Common caps in professional practice: 2 to 3 impressions per day for display in prospecting, 8 to 12 impressions over the duration of the campaign for a single creative. In retargeting over short windows (7 to 14 days), caps can be higher (10 to 20 impressions), but with more aggressive creative rotation to prevent wearout.
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