View-Through Conversion

What Is a View-Through Conversion?

A view-through conversion happens when someone sees your ad (an impression) but does not click it, and then later visits your store and makes a purchase. The ad platform counts this as a conversion driven by the ad, even though the customer never interacted with it directly.

For example: a customer scrolls past your Instagram ad without clicking. Three hours later, they Google your brand name and buy directly. Meta counts that as a view-through conversion and reports it in your ad dashboard.

How View-Through Tracking Works

Ad platforms track view-through conversions by:

1. Recording that your ad was displayed to a user (impression)
2. Storing an identifier linking that impression to the user
3. Monitoring whether that user converts on your site within the view-through attribution window
4. If they do, crediting the original ad impression

Meta’s default view-through window is 1 day. Google Ads uses a 1-day view-through window for YouTube and Display campaigns (search campaigns do not have view-through tracking).

The View-Through Controversy

View-through conversions are among the most debated metrics in digital marketing. The central question is: did the ad actually influence the purchase, or would the customer have bought anyway?

Arguments For Counting VTCs

• Brand awareness has value: Seeing an ad can influence a purchase decision even without a click
• Captures cross-device behavior: A customer might see an ad on mobile and buy on desktop without a trackable click path
• Better reflects video ad impact: Video ads are designed to build awareness, not drive immediate clicks

Arguments Against Counting VTCs

• Inflates ad platform numbers: Every ad impression to someone who eventually buys gets credit, even if the ad was barely visible
• Correlation is not causation: The customer might have bought regardless of seeing the ad
• Double-counting: If a customer saw ads on Meta, Google, and TikTok before buying, all three platforms claim the view-through conversion
• Incentivizes impression farming: Platforms benefit from serving more impressions when VTCs are counted

Impact on Your ROAS

Including view-through conversions can dramatically inflate your reported ROAS. A campaign that looks like a 5x ROAS with view-through included might only be 2x when you count click-through conversions alone.

For most Shopify merchants, the recommendation is to either:

1. Exclude view-through conversions entirely from your primary ROAS calculations
2. Report them separately so you can see the difference
3. Discount them (e.g., count VTCs at 25% of a click-through conversion)

View-Through Conversions and iOS Privacy

After iOS 14, view-through tracking became even less reliable. Apple’s ATT framework limits Meta’s ability to track ad impressions back to website purchases, so many view-through conversions are now modeled (estimated) rather than observed. This makes the data even harder to trust.

View-Through Conversions in Detectly

Detectly uses UTM-based attribution which inherently tracks click-through conversions only. A customer must actually click a tagged link for the attribution to register. This gives you a conservative, reliable picture of which ads are truly driving purchases, free from the inflation that view-through counting introduces.