1. Introduction
Programmatic advertising has revolutionized the way marketers and advertisers reach their target audiences. By using algorithmic technology and real-time bidding (RTB), advertisers can serve highly relevant ads to users across a vast network of digital channels in milliseconds. But while programmatic advertising excels at delivering targeted impressions, the question remains: which metric truly drives the bulk of conversions—click-through or view-through?
Historically, many advertisers have relied on click-through conversions (CTCs) as the primary metric to measure campaign success. It’s straightforward to look at who clicked on your ad and whether they purchased afterward. However, in today’s complex digital landscape, view-through conversions (VTCs)—users who see an ad but do not click, yet later convert—play an increasingly significant role.
The problem is, traditional analytics platforms such as Google Analytics often rely on last-click attribution and require a UTM parameter to identify the source of that click. This leaves the potential value of a simple ad impression on the table. More and more evidence suggests that the majority of conversions in many programmatic campaigns are influenced—at least in part—by impressions (view-throughs), especially in industries where purchase decisions are less impulse-driven and require more user consideration.
In this deep dive, we’ll explore the nuances of view-through versus click-through conversions, discuss where most conversions come from in programmatic advertising, reveal how long it typically takes for users to convert, and explain how UTMs on platforms like Google Analytics may not track all those conversions. We’ll also provide best practices on how to bridge the gap and more accurately measure your programmatic advertising efforts.
2. Understanding Programmatic Advertising
Programmatic advertising refers to the automated buying and selling of online ad inventory in real time. It utilizes software and algorithms to purchase display space across websites, mobile apps, and other digital platforms, making the ad-buying process more efficient and data-driven than traditional media buying.
Key components of programmatic advertising include:
- Demand-Side Platforms (DSPs): Used by advertisers to buy ad impressions across various websites and apps.
- Supply-Side Platforms (SSPs): Used by publishers to automate the selling of ad space.
- Ad Exchanges: Marketplaces connecting DSPs and SSPs in real time.
- Real-Time Bidding (RTB): The instantaneous auction that occurs every time an ad impression becomes available.
Because programmatic advertising is data-driven, advertisers can segment audiences based on demographics, browsing behaviors, interests, and more. These hyper-targeted campaigns often aim to achieve two primary goals: increasing brand awareness (impressions) and driving conversions.
3. Conversion 101: Definitions and Importance
In digital advertising, a conversion is any action you want the user to take after engaging with your content. Conversions vary widely, such as:
- Making a purchase (eCommerce)
- Filling out a lead form
- Downloading a whitepaper or eBook
- Signing up for a newsletter
- Initiating a phone call (in some cases)
Because programmatic advertising is often performance-driven, conversions serve as a key performance indicator (KPI). Advertisers want to see a positive return on ad spend (ROAS) or cost per acquisition (CPA) that’s within acceptable bounds.
However, attribution—giving credit to the right channels or touchpoints for driving those conversions—is where complexity arises. Click-through and view-through conversions represent two distinct attribution models that can drastically change how you measure success.
4. Click-Through vs. View-Through Conversions
4.1 What is a Click-Through Conversion?
A click-through conversion (CTC) happens when a user clicks on your ad and then completes a desired action (e.g., purchasing a product or filling out a form) within a given attribution window. Typically, these conversions are easier to track because:
- The user actively clicks on the ad.
- A UTM parameter or tracking tag is appended to the destination URL.
- Analytics platforms detect the click source and attribute the conversion to that specific ad campaign, ad group, or creative.
CTCs have been the gold standard in performance marketing because they’re straightforward, measurable, and leave a clear trail from click to action.
4.2 What is a View-Through Conversion?
A view-through conversion (VTC) occurs when a user views or is served an ad (but does not click on it), and then completes a conversion within a set attribution window. For instance, if someone sees your display ad while reading an article but doesn’t click, and then later visits your site directly or via a search engine to make a purchase, that can be counted as a view-through conversion—assuming your tracking technology or ad platform recognizes that user as having previously been served your ad.
4.3 The Difference in Attribution Windows
Both click-through and view-through conversions rely on attribution windows—a preset time frame (often 7, 14, or 30 days) within which a conversion can be attributed to the ad exposure or click. View-through windows can vary based on industry and platform. If a user sees an ad today but only purchases 20 days later, it may not be counted as a view-through if your window is set to 14 days.
5. Where Most Conversions Come From: The Overlooked Power of View-Through
Over the last few years, marketers have grown more aware that view-through conversions often make up a substantial portion of total conversions—sometimes outnumbering click-through conversions by a ratio of 2:1 or even 3:1, depending on the industry and campaign goals.
Why does this happen? Not every user who sees an ad is ready to buy immediately. The ad may plant a seed of awareness or remind them of a brand or product they’re considering, but they might not be compelled to click at that moment. Later, when the user is ready to purchase, they recall the ad’s message and either:
- Type the URL directly into their browser.
- Conduct a branded search on Google or Bing.
- Click a link from a different marketing channel (email, organic social, etc.).
Because the user may not click on the ad directly, a last-click or UTM-based approach would fail to give credit to the programmatic ad that played a pivotal role in shaping that user’s decision. In many cases, the ad impression is a critical but invisible step in the buyer’s journey.
6. Why People Often Buy on a View-Through Basis
There are several reasons why users are more likely to convert on a view-through basis than a click-through basis:
- High Consideration Products: Goods and services that require more thought, such as real estate, automotive, travel, or B2B software, often see lower click-through rates. Users may see the ad, note it, but decide to gather more information before clicking or visiting a website.
- Retargeting and Frequency: A retargeting ad might remind users of a product they previously explored. After enough exposures, the user may revisit the brand’s website via a direct search or a saved bookmark.
- Mobile Habits: Mobile users often scroll quickly and rarely click on ads due to bandwidth, website loading time, or simply the user’s preference to shop on desktop. However, the impression can still register in their mind.
- Banner Blindness (Yet Subconscious Awareness): Even though many internet users are prone to ignoring banner ads consciously, repeated impressions can still create subconscious brand recognition—prompting them to convert later when they need the product.
7. Typical Purchase Pathway and Conversion Timeline
7.1 The Awareness Phase
In the awareness phase, users first become aware of a brand, product, or service. Programmatic ads might show up on relevant websites or apps. The user may or may not click, but they start forming an impression of the brand. This initial exposure often influences their future purchasing decisions.
7.2 The Consideration Phase
During the consideration phase, users actively research solutions. They compare features, prices, and brand reputation. Often, the user will see additional ads through retargeting or by being re-introduced to the brand in relevant online spaces. Programmatic ads continue to serve impressions based on user behaviors (e.g., site visits, cart abandons, or content consumption patterns).
7.3 The Decision Phase
By the decision phase, the user has significantly narrowed down their choices. Retargeting ads might show specific product offers, discounts, or reminders of items left in the user’s cart. At this point, even if the user doesn’t click on the ad, they might recall the brand or see an enticing promotion. When they finally do decide to purchase, they may go directly to the site or search for the brand’s name.
7.4 The Role of Retargeting in Extending Conversion Timelines
Retargeting campaigns often have a significant influence on lengthening or shortening the purchase pathway. A user who initially saw a brand during a display campaign might encounter multiple touchpoints—Facebook ads, Google Display Network ads, or native ads—before eventually converting. This creates a complex tapestry of impressions and clicks that often go beyond what a single click-based attribution model can measure.
Typical conversion times can range from a few hours for low-cost impulse buys (e.g., a trendy t-shirt) to several weeks or even months for high-ticket or B2B items. During this journey, multiple impressions may go unclicked but remain crucial in securing the eventual sale.
8. How UTMs on Google Analytics Might Not Capture All Conversions
8.1 UTM Tracking Explained
UTM parameters are tags appended to a URL to track the performance of campaigns in platforms like Google Analytics. For example, a link might look like:
When the user clicks on this link, Google Analytics logs the source, medium, and campaign. Marketers gain visibility into which campaigns drive clicks and subsequent conversions.
8.2 Limitations of Last-Click Models
However, Google Analytics primarily relies on last-click attribution by default. If your user:
- Sees a display ad on a website (view-through).
- Later searches your brand on Google and clicks an organic link.
- Makes a purchase.
Google Analytics will attribute the conversion to organic search, not the display ad. This limitation means the initial display ad impression receives no credit, even if it was crucial in sparking the user’s interest.
8.3 The Hidden Impact of View-Through Engagement
Because UTMs are only recorded when a user clicks through a tagged URL, view-through conversions are not tracked in Google Analytics by default. Some advanced setups and third-party tracking solutions (e.g., Google Campaign Manager 360, DoubleClick Campaign Manager, or specialized DSP measurement tools) can record impressions and tie them to user IDs, thereby measuring view-through conversions. But these setups can be complex, require integrations, and often require log-level data that typical Google Analytics properties may not have.
As a result, advertisers relying solely on GA’s last-click and UTM-based reports can grossly underestimate the effectiveness of programmatic ads. They may see lower conversion rates from display ads, leading them to reduce or eliminate ad spend in places where they’re actually generating substantial brand lift and incremental conversions—just not in the form of click-through conversions.
9. Data & Statistics on View-Through Conversions
While stats vary across industries, here are some aggregated data points and insights often cited by digital marketers:
- 80–90% of individuals who see a retargeting ad never click, but that doesn’t mean they do not convert.
- A study by Nielsen found that brand recall increases up to 80% after multiple exposures to display ads, even when users do not click.
These numbers highlight a crucial point: even if your click-through rates are underwhelming, your ads can still be quietly driving conversions by increasing awareness and preference for your brand. That brand preference often comes to fruition when people are ready to buy.
10. Best Practices for Tracking and Attribution
How can advertisers better measure and leverage view-through conversions? Below are some best practices that can help you ensure you’re not overlooking a large portion of your advertising value.
10.1 Moving Beyond Last-Click
It’s essential to adopt attribution models that consider multiple touchpoints, such as:
- Linear Model: Gives equal credit to every channel in the conversion path.
- Time-Decay Model: Assigns more weight to touchpoints closer to the final conversion.
- Position-Based Model (U-Shaped): Gives 40% credit to the first and last touchpoints, and splits the remaining 20% among the middle interactions.
By examining how these models compare, you can see the broader influence of top-of-funnel impressions that lead to eventual conversions.
10.2 Embracing Multi-Touch Attribution
Multi-touch attribution recognizes that there may be 3, 5, or 10 different touchpoints leading up to a conversion. Each one should be measured and weighted accordingly. Tools such as Google Analytics 4 (GA4), Adobe Analytics, and specialized attribution platforms (e.g., Hyros, Wicked Reports) allow you to track user paths across channels.
Multi-touch attribution can be more challenging to implement but often provides deeper insights. For example, you might discover that seeing a display ad on Day 1 is consistently associated with higher conversion rates on Day 14, even though users rarely click on those ads.
10.3 Using Platform-Specific Insights
Many DSPs and ad platforms (e.g., The Trade Desk, Google Display & Video 360) offer built-in reporting for view-through conversions. These platforms typically place a conversion pixel on your website. Whenever someone lands on your conversion page (e.g., order confirmation, lead form thank-you page), the pixel fires and checks if that user has been served an ad within the attribution window. If yes, the conversion is recorded as a view-through.
While some marketers fear “overcounting” conversions, the key is to review these metrics in the context of other data points. Compare click-through conversions, view-through conversions, and any changes in overall site traffic, brand searches, or direct visits.
10.4 Integrating Offline Conversions
In some industries—particularly automotive, real estate, and
