A view-through conversion (VTC) is recorded when a user sees a display or video ad without clicking it, but later converts on the advertiser's website within a specified attribution window.
Quick Answer
A view-through conversion (VTC) is recorded when a user sees a display or video ad without clicking it, but later converts on the advertiser's website within a specified attribution window.
View-through conversions track post-impression conversions, not post-click, they measure ad exposure, not direct response
Use a 1-7 day VTC window to reduce false attribution from coincidental ad exposure
Report VTCs separately from click-through conversions and use conversion lift studies to validate incremental impact
Key Takeaways
View-through conversions track post-impression conversions, not post-click, they measure ad exposure, not direct response
Use a 1-7 day VTC window to reduce false attribution from coincidental ad exposure
Report VTCs separately from click-through conversions and use conversion lift studies to validate incremental impact
How View-Through Conversion Works
A view-through conversion occurs when a user is served an impression of a display or video ad, they see it but don't click, and then visits the advertiser's website and converts within the VTC attribution window, typically 1-30 days. The conversion is attributed to the last-viewed ad impression. VTCs are tracked via the same conversion tag used for click-based conversions; the distinction is in whether a click or only an impression preceded the converting session.
Why View-Through Conversion Matters for B2B Marketing
View-through attribution is controversial because it can inflate the apparent contribution of display and video campaigns. A user may have converted through organic search, direct visit, or email, and also happened to be served a display impression recently. Without incrementality testing, it's impossible to know whether the display impression causally influenced the conversion or simply co-occurred. This is why VTCs are often separated from click-through conversions in reporting and excluded from primary ROAS calculations.
View-Through Conversion: Best Practices & Strategic Application
Best practices for VTC measurement include: using a short VTC window (1-7 days rather than 30) to reduce false attribution; reporting VTCs in a separate column from click-based conversions rather than combining them; running geo holdout tests or conversion lift studies to measure true incremental impact; and weighting VTCs at 0.1-0.3 when combining with click-based conversions in blended attribution models.
Agency Perspective: View-Through Conversion in Practice
At MV3, we report VTCs transparently to clients in a dedicated column and never include them in primary ROAS or CPA KPIs without explicit discussion. The best use of VTC data is to understand display and video's role in the awareness and consideration stages. When we see a campaign generating high VTCs with low VTC costs-per-action, we treat it as a signal that display is warming audiences for search, not as proof of direct ROI.
A view-through conversion (VTC) is recorded when a user sees a display or video ad without clicking it, but later converts on the advertiser's website within a specified attribution window.
VTCs are observable but not definitively causal. A user who saw a display ad and later converted may have converted anyway without the ad. The reliability depends on your VTC window length and the quality of your incrementality testing. Shorter windows and holdout tests produce more meaningful VTC data.
Generally no, at least not at full weight. Including VTCs in ROAS inflates the metric because it credits display for conversions that may have been driven by other channels. Report VTCs separately and use them as a directional signal for brand-building impact rather than a direct ROI measure.
Google Ads defaults to a 30-day VTC window for display campaigns. Meta uses a 1-day default. Industry best practices suggest 1-7 days for most advertisers. The shorter the window, the more confident you can be that the impression influenced the conversion rather than coincidentally preceded it.
MV3 Marketing helps B2B companies apply these strategies to drive measurable pipeline growth. Our team executes ppc management for technology, SaaS, and professional services companies.
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