View-through rate (VTR) usually measures how often an impression meets a platform’s criteria for a video view; completion rate measures how often a video is played to its end. The distinction is useful, but the labels are not consistent across platforms. Before comparing rates, check the platform’s definition, the numerator and denominator, and what counts as a view or a completion.
How the two metrics differ
| Metric and example definition | Formula | What it indicates |
|---|---|---|
| Google Ads TrueView view rate | Views ÷ impressions | The share of impressions that resulted in a view under the format’s view criteria. |
| Completion rate, as reported separately by Google Ad Manager | Completed plays ÷ the reporting denominator | The share of reported opportunities in which the video played to the end. The denominator depends on the platform’s reporting definition. |
Google Ads says its TrueView view rate helps determine the percentage of impressions that resulted in a view, but also notes that impression and view criteria vary by video format. Google Ad Manager defines completion as a video playing to the end and lists completion rate separately from view-through rate. Google Ads: About YouTube ads and view metrics; Google Ad Manager API: VideoContentData.
Why VTR can mean different things
VTR is not a single cross-industry formula. Google Ads uses TrueView view rate for views divided by impressions. Microsoft Invest’s programmatic guaranteed buying documentation calls its video completion rate “VTR” or “VCR,” and defines it as completed video creatives divided by video creative impressions. The same abbreviation can therefore describe different events, even when both rates use impressions as the denominator. Microsoft Invest: Programmatic guaranteed metrics.
Denominators also vary. Microsoft’s documented completion rate uses video creative impressions. Apple News Ads defines completion rate as completions divided by total video impressions; a video counts as complete when 100% has been viewed. Apple notes that its quartile reporting is not cumulative. Apple News Ads: Understand campaign performance.
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What the rates can tell you together
A view rate helps show how often impressions meet a platform’s view criteria. A completion rate helps show how often videos reach the end under the platform’s definition. If view rate is relatively strong while completion rate is weaker, one possible explanation is that many viewers start but do not finish. That pattern alone does not explain why: duration, placement, autoplay or click-to-play behavior, skip rules, audience, and the denominator used in each report can all affect interpretation.
For a fair comparison, align the platform, format, placement, denominator, and reporting period. A rate based on impressions is not directly interchangeable with one based on video starts, and two platforms’ “views” may not represent the same event.
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Check these details before comparing reports
- View threshold: What event or interaction qualifies as a view, and is there a time threshold?
- Denominator: Does the formula use impressions, starts, or another event?
- Completion event: Does completion mean the creative reached 100%?
- Format and placement: Are the videos shown in equivalent environments and formats?
- Playback behavior: Do skip rules, autoplay, or click-to-play affect the opportunity to view?
- Reporting date: Did the platform change its definition or apply a revised definition to past data?
The date matters in practice: LinkedIn says that Campaign Manager completion-rate data from March 2025 onward uses completions divided by impressions, and that it applies this definition to historical data. LinkedIn Marketing Solutions: Video metrics.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.How to use the Google in-stream benchmark
Google Ads Help gives an average TrueView view rate of about 10–15% for in-stream ads across industries and says the rate can vary significantly. This is a format-specific view-rate reference, not a completion-rate benchmark or a universal target for all video advertising. Compare your result only with reports that use compatible format and metric definitions. Google Ads: About YouTube ads and view metrics.
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