15% of Ad Impressions were Exceeding Frequency Capping: Here’s How We Fixed It in a CTV Campaign

Your ads are getting delivered, but to a limited audience pool.

This is what we recently saw in one of the campaigns running on CTV platforms.

While impression delivery appeared strong for this Indonesian brand, engagement metrics did not align proportionately with campaign spend. On deeper analysis, it was observed that ad impressions were being served repeatedly to a limited set of devices instead of expanding to new viewers.

This indicated a potential frequency capping breach, where ads were being delivered beyond the defined exposure threshold.

Impact? Poor campaign efficiency and ad fatigue.

So, if you are an advertiser running OTT & CTV advertising campaigns, or your audience is experiencing something similar, this is must-read.

Deep-Down to Identify the Problem

Throughout the campaign, 6.02 million ad requests were evaluated through VAST-level validation signals.

What the Data Revealed About Frequency Capping Breach

The evaluation uncovered that:

• 15.86% of impressions were exceeding the defined frequency cap
• A total of 16.47% delivery was prevented, combining frequency capping breach and invalid traffic filtration
• Over 950,000 impressions were blocked due to frequency violations alone.
• Certain Smart TV device IDs generated thousands of repeated ad requests within short time windows

In one instance, a single device triggered over 7,600 ad requests in a single day, clearly indicating abnormal repetition behavior.

Additionally, a small portion of traffic (0.61%) was linked to data center and VPN-based IP activity, pointing toward advanced traffic manipulation patterns.

The Action Taken

To address this, real-time frequency validation was implemented at the VAST integration level. Every ad request was evaluated against the predefined frequency threshold before delivery.

If a device had already crossed the limit, a no-ad response was triggered, preventing further exposure. Repeated device patterns and abnormal request spikes were filtered out without impacting legitimate delivery. This ensured that exposure remained controlled and aligned with the campaign’s intended frequency settings.

The Measurable Impact

After filtration and enforcement:

• 691,691 impressions were validated and served cleanly.
• Video engagement remained strong.

These results demonstrated that once frequency capping was enforced and invalid traffic was removed, genuine viewer engagement remained stable and healthy. More importantly, reach distribution improved, budget wastage was reduced, and exposure became more balanced across devices.

What This Means for OTT & CTV Advertisers

To prevent frequency capping breaches, simply setting up a frequency cap is not enough. What matters is whether that cap is actively enforced at the moment of ad delivery or not. mFilterIt ensures that ad exposure remains controlled, balanced, and performance-driven through real-time frequency governance. Here’s how advertisers can benefit:

Ensures Proactive Enforcement Of Frequency Caps

By validating ad requests before they are served, exposure thresholds are actively monitored and enforced. This prevents ad impressions from exceeding defined limits and ensures campaigns remain compliant throughout their lifecycle.

Prevents Impression Wastage On Limited Devices

Device identities are analyzed to monitor how frequently a specific device has been exposed to an ad. By tracking repetitions at the device level, advertisers can clearly identify when impressions are being served within a limited audience pool and take corrective actions accordingly.

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