Passing the Core Web Vitals Test: A Mobile Speed Strategy
Client: A high-traffic news and media publisher with ad-supported revenue.
Challenges We Faced
The client was seeing a drop in mobile traffic due to Google’s “Page Experience” update:
Failed CWV
They were failing all three Core Web Vitals (LCP, FID, CLS) on mobile.
Ad-Induced Shift
Display ads were loading late and pushing content down, causing massive layout shifts (CLS).
Slow Server Response
Time to First Byte (TTFB) was over 1 second due to a bloated database.
JavaScript Bloat
Unused tracking scripts were delaying interactivity.
Unoptimized Images & Media
Heavy, uncompressed images and videos were further slowing page load, especially on mobile devices.
Pass Google’s Speed Test
“Is your site too slow? Our Site Speed & Core Web Vitals services make your website lightning fast.”
Our Approach – How We Solved These Challenges
Core Web Vitals Optimization
We reserved static space for ad slots in the CSS, preventing layout shifts when ads loaded.
Code Minification
We deferred non-essential JavaScript and CSS to prioritize the “above the fold” content rendering.
Image Optimization
We implemented Next-Gen formats (WebP) and lazy loading for images below the fold.
Server Tuning
We implemented object caching (Redis) to slash database query times.
Results
| Metric | Before | After | Growth |
|---|---|---|---|
| Mobile LCP (Loading Speed) | 4.2s | 1.8s | 57% Faster |
| CLS Score (Visual Stability) | 0.25 (Poor) | 0.05 (Good) | Passed |
| Mobile Organic Sessions | 500k/mo | 650k/mo | +30% |
Free Speed Check
“Failing Core Web Vitals? Book a Free Performance Analysis with our best technical seo agencies team!”
Advice for Marketers & Brand Owners
- Stability is key. Google hates it when content jumps around. Define dimensions for all images and ads.
- Audit your scripts. Third-party trackers often kill speed. If you aren’t using it, remove the tag.
- Mobile first. Test your speed on a 4G connection, not just your office WiFi.
Extra Factors That Made It Work
- The technical seo services company team worked directly with the client’s ad ops team to balance revenue needs with UX requirements.
- We used Cloudflare CDN to serve assets closer to the user, reducing latency.
