Technical SEO Services
Technical SEO Services Built to Increase Revenue
Award-winning — Improved Site Speed. Better Rankings. Higher Conversions.
Technical SEO is the foundation everything else sits on. If your site is slow, poorly structured, or has crawl issues, no amount of content or links will save you. We fix the infrastructure so your SEO strategy has solid ground.
Companies we've worked with
durhamlane: Catching the Catastrophic SEO Issue Other Experts Missed
Before founding Visionary, Chris was the sole Digital Marketing Specialist at durhamlane — a Newcastle B2B sales acceleration business. The headline moment: catching a pre-launch technical SEO issue that would have cost the business hundreds of thousands of pounds, after every previously-engaged consultant had signed off.
Page-view growth
Revenue, no SEO budget
Saved (catastrophic catch)
In-house tenure
Overview
What is Technical SEO?
Technical SEO covers everything that affects how search engines crawl, index, and render your website. It includes site speed, mobile performance, URL structure, XML sitemaps, robots.txt, structured data, and Core Web Vitals.
Most businesses ignore technical SEO until something breaks. A slow site, poor mobile experience, or crawl errors can silently kill your rankings and revenue potential.
We audit your site's technical foundation and fix what's holding you back—often unlocking significant ranking improvements without changing a single word of content.
Technical SEO directly impacts revenue: faster sites convert better, crawlable sites rank higher, and structured data drives richer search results.
A 1-second improvement in page speed can increase conversions by up to 7%.
Visionary is a world-leading SEO agency trusted by brands across the UK and beyond. Our senior specialists combine deep technical expertise with commercial strategy to deliver measurable organic growth.
Page-Unique Signature
Run the 47-Point Technical SEO Audit Score
Most technical SEO audits are sold as a black box — pay first, see results later. Below is the 47-point checklist we run on every Visionary audit. Score your own site directly in the page. Top 5 highest-impact failures appear instantly. Then you decide whether you want us to run the full version.
Crawl architecture
- sitemap.xml present + valid
- robots.txt configured correctly
- No orphan pages
- No infinite-redirect chains
- Internal link depth ≤ 4 clicks
- No duplicate canonicals
Indexation governance
- Canonical tags present site-wide
- No rogue noindex on key pages
- Parameter handling configured
- No thin/duplicate content patterns
- Hreflang annotations valid (if multi-region)
- Faceted nav controlled
Schema infrastructure
- Organization schema present
- BreadcrumbList present
- Article / Product schema where applicable
- FAQPage where applicable
- WebPage schema present
- Person schema (where applicable)
- Review schema (where applicable)
Core Web Vitals
- Mobile LCP < 2.5s
- INP < 200ms
- CLS < 0.1
- Desktop LCP < 2.0s
- No layout-shift on key templates
Site speed
- GZip / Brotli enabled
- HTTP/2 or HTTP/3
- Image lazy-load
- Fonts preconnected
- Render-blocking JS minimised
HTTPS + security
- HTTPS enforced site-wide
- HSTS configured
- Mixed-content resolved
- Security headers configured
International / multi-region
- Hreflang matches store-views
- x-default present
- Locale-pricing alignment
- Cross-region canonical strategy
Content + on-page
- Title tags unique site-wide
- Meta descriptions unique
- Single H1 per page
- Heading hierarchy clean
- Internal linking strategy in place
- Image alt-text coverage >80%
- dateModified on dated content
- Structured data on key page types
- Content depth per template
- No auto-generated boilerplate
Live Score
0 / 47 answered · severity-weighted
Issue Prevalence
Of 100 Audits We Run, This Is What We Find
Across our last 100+ technical SEO audits, the same critical failures appear with predictable frequency. Below is the prevalence data — the numbers competitors don't publish. Most accounts have at least 6 of these unaddressed at engagement start. The top three are usually fixable in week one.
Sources: Visionary client portfolio audits Q1 2026 (100+ accounts, mixed verticals EU + US). Severity-weighted; the top 3 are typically the highest-leverage week-one fixes.
Audit-to-Uplift
The Audit-to-Uplift Curve — One Engagement
All-time record for Google Ads leads · 3 months · technical SEO + paid in coordination
Rocketseed engaged Visionary with a Google Ads account dominated by spam leads and a site with significant technical SEO debt. The technical audit identified canonical inconsistency, hreflang errors across regional pages, schema gaps on key product pages, and Core Web Vitals failures across the mobile experience. Phase one rewrote the technical foundation. Phase two layered in paid Google Ads + Microsoft LinkedIn audience overlay. Three months in, the account hit an all-time record for Google Ads leads — and organic search had moved from a position previous engagements could not improve.
Redacted GSC organic clicks (indexed to 100 at audit completion)
Redacted GSC organic-click trend, indexed to 100 at audit completion. The technical-audit inflection point is typically visible in GSC within 2–4 weeks. Real client data, anonymised.
DIY vs Visionary
DIY Audit vs Visionary Audit — What You Actually Surface
| Dimension | DIY (Screaming Frog / Sitebulb / GSC) | Visionary audit |
|---|---|---|
| Crawl | ✓ — you can run it | ✓ — we run it |
| Issue identification | Tool flags issues automatically | Tool + senior judgment on which issues actually matter |
| Severity weighting | Generic 'high / medium / low' | Severity weighted by impact-on-revenue + crawl-budget cost |
| Schema validation | Validates if present | Validates + recommends additional schema where missing |
| Cross-system synthesis | Tool reports on isolated layers | Synthesised across layers (CWV ↔ Quality Score ↔ feed) |
| Implementation guidance | Generic recommendations | Specific to your platform (Shopify / WC / Magento / WP) |
| Prioritisation | Output is a list | Output is a 90-day roadmap with effort × impact ranking |
| Implementation | n/a | Visionary implements (or works with your dev team) |
DIY tools surface issues. They don't tell you which are urgent, which are cosmetic, or how to fix them on your platform. The audit is in the synthesis, not the crawl.
Tool Stack
The Tool Stack Behind Every Audit
Crawlers
- Screaming Frog (the workhorse)
- Sitebulb (visualisation + reporting)
- Lumar / DeepCrawl (enterprise scale)
Data + Analytics
- Google Search Console (core data source)
- Ahrefs Site Audit (third-party benchmark)
- Google Analytics 4 (impact measurement)
- Microsoft Bing Webmaster Tools (cross-platform validation)
Schema + Validation
- Google Rich Results Test
- Schema.org Validator
- Manual JSON-LD QC
Tool choice doesn't make an audit. Tool combination + senior judgment on what to extract from each does. We don't use one — we use what each is best at.
Last reviewed: 28 April 2026 by Chris Coussons, Founder.
AB Ellie: 19 #1 US Rankings — Including "Bridal Earrings" + "Wedding Earrings"
US bridal & wedding jewellery e-commerce brand on Shopify. Pre-engagement, head-term commercial keywords sat outside the top 30. Four months of full-stack e-commerce SEO — technical, collection pages, product pages, schema, content — produced 19 position #1 rankings, US-wide #1 for the two highest-volume category head terms, and an 800% year-on-year lift in non-branded organic clicks.
Position #1 rankings
"Bridal Earrings" + "Wedding Earrings"
YoY non-branded organic clicks
Engagement window
What's Included
What Our Expert SEO Services Include
Fully managed campaigns
Technical SEO is just one piece. Our managed service handles everything from strategy to execution, so your technical foundations translate into sustained ranking improvements.
Learn moreTechnical SEO
Crawlability, indexation, Core Web Vitals, and site architecture—we audit and fix the infrastructure that determines whether search engines can find and rank your content effectively.
Learn moreOn-page SEO
Once the technical foundation is solid, on-page optimisation ensures each page targets the right keywords with properly structured headings, meta data, and internal linking.
Learn moreContent strategy
Technical excellence needs content to rank for. We build content strategies that leverage your improved crawl efficiency and site speed to capture more organic traffic.
Learn moreLink building
Technical foundations make your link building more effective. Clean site architecture ensures link equity flows properly throughout your site, amplifying every backlink you earn.
Learn moreLocal SEO
Technical issues often disproportionately affect local rankings. We ensure your local landing pages, schema markup, and Google Business Profile are technically flawless.
Learn moreMobile SEO
With mobile-first indexing, mobile technical performance directly determines rankings. We optimise Core Web Vitals, responsive rendering, and mobile page speed.
Learn moreAI-powered SEO
We use AI-driven crawl analysis and log file insights to identify technical issues at scale, prioritising fixes by their actual impact on rankings and revenue.
Learn moreSEO migration
Platform migrations are the highest-risk technical SEO challenge. We've handled 50+ migrations with zero ranking drops through meticulous redirect mapping and testing.
Learn moreOur Process
How We Do Technical SEO
Comprehensive Audit
Full site crawl analysing speed, mobile performance, crawl efficiency, and indexation issues.
Core Web Vitals
Analyse and optimise LCP, FID, and CLS to meet Google's performance benchmarks.
Implementation
Technical fixes prioritised by revenue impact. Speed optimisation, schema markup, crawl fixes.
Monitor & Optimise
Ongoing monitoring to ensure improvements stick and new issues are caught early.
Why Us
Why Work With Visionary?
No Ranking Drops
Migration and technical work planned and tested to protect your existing rankings.
Data-Led Decisions
Every optimisation backed by actual performance data.
Senior Specialists
Led by people with 50+ site audits and migrations.
Ongoing Support
We don't hand off and disappear. Ongoing optimisation built in.
Our People
Meet Our Specialists
Chris Coussons
Founder & Senior SEO Specialist
10+ years. 50+ site audits and migrations completed.
Google Ads & SEO Specialist
FAQ
Common Questions
Start Here
Your Revenue. Our Obsession.
Tell us about your business and we'll show you exactly where the opportunities are — no obligation, no sales pitch.
■ Senior specialists only
■ No long-term contracts
■ Free audit included