PTNZ: 98 PageSpeed & 100% SEO Overhaul
Before vs. after: PageSpeed & OpenGraph
Official PageSpeed Insights and OpenGraph meta-tag captures from the baseline audit and post-optimization verification for ptnz.co.uk.
Core Web Vitals delivered in the elite green tier (98/100).
Mobile rocketed from red 50 to 96/100 top-percentile global tier.
5 errors & 4 warnings resolved; branded 1200×630 share card deployed.
Complete Schema.org structured data for LLMs & AI search bots.
Audit screenshots
PageSpeed Insights & OpenGraph.xyz captures
OpenGraph fixes
Technical pillars
Core Web Vitals & Font Acceleration
Preloaded DM Sans and Clash Display webfonts with font-display: swap, eliminating layout shifts and accelerating LCP.
OpenGraph & Social Meta Reconstruction
Fixed 5 critical inspector errors; deployed branded 1200×630 cards for crisp previews on LinkedIn, Twitter/X, and WhatsApp.
AEO & GEO Agentic Schema Architecture
Structured JSON-LD knowledge graphs for UK energy transition entities, lifting Agentic Browsing from 1/3 to 3/3.
Accessibility & Usability Hardening
Tuned color contrast ratios, mobile tap targets, and semantic landmarks to achieve a perfect 100/100 Accessibility score.
Technical SEO & Crawl Optimization
Remediated canonical headers, robots crawl rules, and sitemap synchronization, propelling SEO to a verified 100/100.
Institutional Grade Credibility
Transformed PTNZ’s web platform into a sub-second showcase fit for institutional UK energy investors and enterprise off-takers.
What We Did
Font Preloading & Render-Blocking Script Remediation
Configured preload directives for critical WOFF2 typography and deferred non-essential JavaScript to slash mobile FCP.
OpenGraph Meta Repair & Branded Social Cards
Resolved 5 critical meta-tag inspector errors, generating high-resolution og:image, og:title, and Twitter summary cards.
Schema.org Knowledge Graph & Agentic AI Readiness
Implemented rich structured data for energy transition services, driving Agentic Browsing from 1/3 to a flawless 3/3.
Mobile UX & Accessibility Optimization
Streamlined mobile navigation breakpoints, enhanced contrast, and achieved 100/100 in Lighthouse Accessibility & Best Practices.
The Direct Results
Starting point: 50 mobile performance, 76 desktop performance, and broken social preview cards (5 critical meta-tag errors including missing title, description, and preview image). In a rapid 48-hour engineering turnaround, NB03 completely overhauled asset delivery, font caching, script deferral, meta tags, and structured data — surging scores to 98 Desktop / 96 Mobile PageSpeed, 100/100 Accessibility, 100/100 Best Practices, 100/100 SEO, and 3/3 Agentic Browsing.
Before vs. After
Delivered in 2-day turnaround (oct 19 → oct 21, 2026).
- ✕Mobile performance at 50; desktop performance at 76
- ✕5 critical OpenGraph errors with missing titles, descriptions & cards
- ✕Agentic browsing degraded at 1/3 (poor AI model recognition)
- 98 Desktop / 96 Mobile PageSpeed in the top 1% global tier
- Flawless OpenGraph social cards on LinkedIn, X, Slack & WhatsApp
- 3/3 Agentic Browsing & perfect 100/100 SEO, Accessibility & Best Practices
Frequently Asked Questions
How did NB03 improve PTNZ mobile performance from 50 to 96?↓
We eliminated render-blocking font downloads by adding preloads and font-display: swap, cleaned up third-party scripts, tuned CSS delivery, and optimized image compression pipelines—achieving sub-second First Contentful Paint and a 96 mobile score.
Why were OpenGraph social cards broken before the audit?↓
The site was missing explicit og:title, meta description, og:image, and twitter tags, causing social platforms like LinkedIn and Twitter to display empty text cards or fallback errors. NB03 created a branded 1200×630 social card and injected calibrated metadata.
What is Agentic Browsing and why does 3/3 matter for UK engineering firms?↓
Agentic Browsing measures how well AI crawlers (ChatGPT, Claude, Perplexity) parse a website. A 3/3 score ensures AI search engines accurately extract PTNZ’s engineering credentials, hydrogen capabilities, and contact details when answering user prompts.
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Engineering & SEO Services Deployed in Our Case Studies
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