Website speed matters—but not always in the way people think. At MarketStorm, we’ve seen a growing trend: businesses using code defer tools or optimization plugins to “speed up” their websites, under the assumption that this will boost SEO rankings.
Unfortunately, while the intent is good, the unintended consequences can be costly—especially when it comes to digital advertising.
What Are Code Defer Tools?
Code defer tools delay the loading of certain scripts—including analytics trackers, tag managers, and ad pixels—so the page appears to load faster. These tools are often built into caching plugins or optimization suites aimed at improving performance scores in audits or page speed tests.
From a web development standpoint, that sounds like a win.
But from a marketing perspective? It’s a different story.
Why Page Defer Tools Hurt Marketing Efficiency
When you defer—or worse, block—marketing scripts, you prevent key signals from being sent. This includes:
- Page views
- Conversion events
- Audience engagement signals
- Attribution data
- Retargeting triggers
- AI optimization inputs
In effect, you’re turning off the very systems that platforms like Google Ads, Meta, and our own MarketStorm AI-powered campaigns rely on to optimize performance.
The Cost You Don’t See
When these signals are missing or delayed, your ad platforms are flying blind. They can’t properly attribute conversions, build audience lookalikes, or adjust bidding strategies. This often leads to:
- Higher cost per lead or conversion
- Wasted budget on low-intent traffic
- Slower or inaccurate campaign optimization
- Poor performance from automation tools like Google’s PMAX
We’ve seen ad spend cost requirements soar by 60–70% when code defer tools are in place—simply because the AI can’t “see” what’s happening on the site.
Good News: There’s a Fix
Most page speed and caching tools offer the ability to exclude certain scripts from being deferred.
We strongly recommend that both Netrics Tag Manager and Google Tag Manager be excluded. This ensures your website continues to run smoothly without interrupting the critical data flow that powers your marketing. In most cases, the instructions for exempting code, like the code for these tag managers, are available in the tool’s support documentation.
It’s Not About Blame—It’s About Balance
We understand that website teams want fast, efficient sites. And we agree—site speed plays a role in user experience. But it’s just as important to make sure your marketing systems stay intact.
This isn’t about pointing fingers. It’s about collaboration. Some of our best-performing campaigns come from teams where developers and marketers work together to find the right balance between speed and strategy.
What You Can Do
- Audit your setup: Make sure tracking and analytics are firing consistently across all pages as soon as the ad click lands on the page.
- Use exemption settings: Don’t defer essential scripts that power your marketing.
- Involve your marketing team before making performance changes.
- Review campaign performance before and after optimization updates.
Page speed tools can be helpful—but only when used thoughtfully. With the right settings in place, you can maintain a fast website and give your marketing team the data they need to succeed.