How to ensure ad viewability in programmatic campaigns

• Viewability is a critical metric in programmatic — it influences how buyers evaluate inventory and bidding opportunities.

• To be considered viewable, display ads must have at least 50% of pixels visible for 1 continuous second (or 30% for large-format display ads). Video ads require at least 50% of the pixels to be visible for 2 continuous seconds.

• Real-world numbers: open web display averages around 70% in ad viewability, CTV video can push close to 90%. 

• Consistently low viewability can result in buyers and DSPs deprioritizing your inventory, leading to lower bidding or filtering it out entirely.

• Optimize ad placement, improve page speed, and use lazy loading for below-the-fold units so ads are rendered closer to the moment they are likely to enter the viewport.

• Advanced SSPs don't just measure viewability after the fact — they can apply pre-auction traffic quality controls, such as Traffic Shaping, to reduce the quantity of ineffective impressions before they reach the auction.

Today, we are talking about programmatic ad viewability and its impact on trading dynamics. In short, the global picture looks like this: in the programmatic landscape, a significant portion of purchased advertising is not considered viewable under industry standards. But this isn’t a system flaw; it’s a filter: low ad viewability usually indicates low traffic quality, which can reduce publisher revenue and decrease bidding activity from buyers.

Global programmatic statistics from 2025-2026 paint an interesting picture: 

• Open-web display impressions average around 70% viewability, meaning a significant share does not meet viewability standards.

• Video formats perform substantially better: in-stream video often exceeds 80%, while CTV video ads achieve viewability rates above 90%.

Below, we discuss programmatic viewability, how it is measured, and how it affects trading. We also explore approaches to improving this metric to achieve long-term gains in monetization.

What is ad viewability?

Understanding ad viewability starts with the right question. Search for “viewability rate programmatic,” and you'll find explanations about “above the fold” (visible immediately, no need to scroll) and “below the fold” (you need to scroll to see the ad slot) placements, and each has its own average viewability rate. However, these metrics mean little without understanding the underlying measurement standard. The viewability rate programmatic buyers and sellers rely on is defined by the IAB/MRC standard — and that's where you should start.

The Media Rating Council worked with IAB to create the MRC viewability standard — here's how it works:

• A display ad counts as viewable once half its pixels (or 30% for large-format display ads) show up on screen for at least one second straight.

• For video ads, the criteria are different: 50% or more of the pixels must be visible for two continuous seconds for the ad to be considered viewable. 

So, as you can see, even half of an ad that flashed for a second is already counted as viewable under industry standards — this is common practice in digital advertising.

Why does viewability matter in programmatic advertising?

Viewability in programmatic advertising is a key indicator of supply quality. Lower viewability is often associated with lower CPMs, weaker CTRs, and reduced conversion performance; in some cases, very low viewability can also indicate low-quality traffic. Conversely, the higher the better — take a look at the table: 

Note: these viewability thresholds represent common industry benchmarks and may vary based on buyer requirements, vertical, and inventory type.

Key factors that affect ad viewability

Viewability is influenced by ad placement, format, and page performance. While device type cannot be controlled, inventory can be optimized for both mobile and desktop environments. Here's what actually matters:

The pattern? Publishers treating viewability as an afterthought differ from those engineering pages specifically for it. This difference can affect the ability to sell inventory at premium rates rather than commodity pricing.

How to measure ad viewability in programmatic

You can't measure programmatic ad viewability without third-party verification. These tools sit on impressions as they load, checking in real time whether each one clears the bar or misses it.

The main players:

• IAS (Integral Ad Science). Integrates across the programmatic supply chain — from DSPs and agencies on the buy-side to publishers and SSPs on the sell-side — providing both pre-bid filtering and post-bid viewability verification.

• DoubleVerify. The solution provides viewability measurement plus fraud detection. Agencies running strict brand campaigns lean heavily on this one.

• Open Measurement SDK. This open-source framework creates a unified measurement layer, allowing multiple third-party vendors to operate on standardized data without requiring separate SDK integrations.

Here's the thing: most buyers expect trusted viewability measurement. So choose a vendor already used by your demand partners. Switching measurement mid-campaign can create data mismatches and complicate negotiations.

7 actionable strategies to improve ad viewability

Wondering how to improve ad viewability without overhauling your entire tech stack? These seven moves work:

1. Optimize ad placement. Premium inventory should be positioned above the fold, as below-the-fold placements experience significant viewability decline.

2. Implement lazy loading. This technique defers ad rendering until users approach the content, preventing wasted impressions on inventory that remains out of view.

3. Deploy sticky or anchor ad formats for mobile. These units maintain visibility as users scroll, which is particularly effective on mobile devices with limited screen space.

4. Reduce ad density. Excessive ad units per page negatively impact performance metrics. Strategic placement reduction typically leads to improved viewability rates and higher CPMs.

5. Improve page load speed. Each additional second of load time measurably reduces viewability. Page optimization — including image compression and script reduction — directly impacts ad performance.

6. Utilize high-impact ad formats. Larger creative sizes (300x600, 970x250) achieve higher viewability rates than standard banners. Reserve these formats for premium inventory where viewability requirements justify their use.

7. Implement upstream traffic quality controls. Invalid traffic and bot activity distort viewability metrics. SSP-level filtering prevents low-quality impressions from reaching your inventory.

How TeqBlaze can help

Building your own white-label SSP? Our solutions support the integration of any third-party viewability filters your business requires. We also feature an ML-driven Traffic Shaping, which filters ineffective bid requests before they reach demand. Viewability thresholds can be enforced through server-side traffic controls, so buyers only see inventory that meets their requirements.

This is how to improve ad viewability at scale — control the supply rather than just measure it. When buyers see consistent quality, they commit to deals. When your platform enforces standards upstream, you're offering something competitor platforms can't: consistently high-viewability inventory.

See what clients say about working with us in opinions and reviews on Clutch and G2. If you’d like to discuss a partnership, book a strategy call. 

Final thoughts

Viewability in programmatic advertising isn't optional anymore — buyers tie budgets to it, and DSPs may filter or deprioritize inventory that doesn't meet thresholds before auctions even start.

What is the difference between 55% and 75% viewability? It's not luck. It's deliberate choices about ad placement, page speed, format selection, and traffic quality controls at the platform level. Publishers who engineer for viewability command premium rates. Those who measure it after the fact stay stuck selling commodity impressions. 

FAQ

What is a good viewability rate for programmatic ads?

Inventory should be visible in 70% of cases. Good publishers usually achieve 75% for display ads and 80% or higher for video ads.

What is the IAB standard for ad viewability?

The rule's pretty straightforward: a display ad counts once half its pixels appear on someone's screen for at least one second. Video's tougher — you need the same 50% visibility for two full seconds instead of one. 

How does viewability affect programmatic CPM?

Better programmatic viewability = better CPMs and CTRs. A good rate improves monetization efficiency.

What tools measure ad viewability?

IAS, DoubleVerify, MOAT, and Open Measurement SDK for advanced use of multiple solutions. Pick whatever your buyers already use.

Can an SSP improve ad viewability?

Yes. SSPs can support integrations with third-party verification tools like IAS or DoubleVerify to measure and filter inventory. More advanced platforms include built-in traffic quality controls — for example, our white-label SSP includes Traffic Shaping, which filters low-viewability impressions before auction.