How many Google Tag Manager websites did you analyze?

1,047 sites using Google Tag Manager. Each one ran the full diagnostic — PageSpeed, SEO checks, SSL verification, and full tech-stack detection.

Is Google Tag Manager fast?

Google Tag Manager sites in our sample average 52/100 on Google PageSpeed with an LCP of 12.8s. Performance depends more on how the site is configured than on the platform itself — we see fast and slow Google Tag Manager sites in every industry we track.

What industries use Google Tag Manager the most?

Google Tag Manager is most common in dental clinics (65 sites in our sample). Full breakdown is in the Adoption by industry section above.

How do I know if Google Tag Manager is right for my website?

Run the free audit on this page. You'll get your own site's performance scored against the Google Tag Manager benchmark, so you can see whether your current stack is costing you speed or SEO rankings.

Tag managers

Google Tag Manager website performance

Average page takes 12.8s to render its main content — 10.3s over Google's passing threshold.

Data as of April 20261,047 sites analyzed

At a glance

Average scores across 1,047 Google Tag Manager sites

Performance

SEO

Accessibility

Core Web Vitals

How Google Tag Manager sites perform in the real world

Avg. LCP

12.8s

Google's Good: < 2.5s

Avg. FCP

4.2s

Good: < 1.8s

Avg. CLS

0.094

Good: < 0.1

Avg. TTFB

0.1s

Good: < 0.8s

Performance spread

How Google Tag Manager sites cluster on page speed

PageSpeed scores grouped into Google's tier labels. The shape of the distribution tells you whether the industry average hides a few great outliers — or a long tail of broken sites.

Critical0–49
44.6%
Needs work50–69
39.7%
Decent70–89
12.8%
Good90–100
2.9%

Long tail: 45% of sites land in the Critical tier. This is where the easiest wins live — any site that climbs above 50 outperforms nearly half the market.

Adoption by industry

Where Google Tag Manager shows up most

Top industries running this stack, based on the diagnostic sample.

Quick wins

The fixes that would move most Google Tag Manager sites forward

Ranked by how often we saw each issue across 1,047 sites. If yours has these, every competitor with them fixed is beating you on something Google measures.

01
3123 broken links
Found on 54.8% of sitesSecuritymedium impact
02
Main content takes too long to appear
Found on 51.6% of sitesSpeedhigh impact
03
1 pages share the same title
Found on 47.5% of sitesSEOmedium impact
04
No sitemap found
Found on 32.9% of sitesSEOhigh impact
05
No robots.txt found
Found on 13.5% of sitesSEOhigh impact

FAQ

Common questions

How we fix it

Web Boost — we fix the gaps we just showed you, every month

The diagnostic above tells you what's broken on Google Tag Manager websites. Web Boost is the monthly retainer that actually ships the fixes: senior developers, AI-assisted, concrete before/after reports, cancel anytime.

Plans from

$497/mo

See how Web Boost works →

Speed + Core Web Vitals
Image compression, caching, lazy loading, render-blocking cleanup — the fixes the benchmark above flagged.
On-page SEO + structured data
Meta tags, canonicals, schema markup, internal linking — every signal Google's crawler expects, audited and fixed.
Conversion rate + mobile UX
CTAs, forms, microcopy, mobile layout. Turn the traffic you're already getting into leads and customers.

The diagnostic engine is the same one we ship for product and agency clients

Is Google Tag Manager working for your site?

Email us and we'll run a diagnostic comparing your performance to the Google Tag Manager sample above. No intake form, results back within a business day.

Email us for a diagnosis

Or write to hello@borahlabs.us directly. No intake form, no pitch deck.