Technical SEO
[Industry] client
- Problem
- [Verified technical issue]
- Fix
- [What we changed]
- Outcome
- [Verified results with timeframe]
Technical SEO that removes the hidden barriers to ranking
Great content can't rank if search engines struggle to crawl, render or understand your site. Our technical SEO services find and fix the issues holding your whole website back, from indexing problems and slow pages to messy architecture and risky migrations.
What technical SEO is
Technical SEO is the part of search engine optimization that deals with how your website is built and served, rather than what it says. Before a page can rank, a search engine has to discover it, crawl it, render it, understand it, decide it's worth indexing, and judge whether it offers a good experience. Technical SEO makes every one of those steps work smoothly.
It's the foundation the rest of SEO sits on. Content, links and on-page optimisation all deliver less than they should when the foundation is weak: pages that search engines never index can't rank, however good they are; duplicate URLs split authority; slow templates hold back every page built on them; and a botched migration can wipe out years of progress in a week.
Technical problems are also easy to miss. A website can look perfectly fine to visitors while quietly blocking search engines from important sections, sending mixed signals about which version of a page matters, or burying key pages many clicks from the homepage. Most of our technical SEO work begins by making those invisible problems visible.
Signs you need technical SEO
- Organic traffic has dropped and nothing obvious has changed.
- Important pages don't appear in Google, or show as "Crawled – currently not indexed" in Search Console.
- Your site is slow, particularly on mobile, or fails Core Web Vitals.
- You publish good content, but rankings stay flat.
- You're planning a redesign, platform change or domain move.
- Your site is large, uses heavy JavaScript, or has filters and parameters that create many URL variations.
Who needs technical SEO most
- Large websites with thousands of pages, where crawl efficiency and architecture really matter.
- E-commerce stores with faceted navigation, variants and out-of-stock pages.
- JavaScript-heavy sites built on frameworks where content may not render for crawlers.
- Businesses migrating to a new platform, design or domain.
- International sites with multiple languages or regions.
- Any site whose rankings have stalled despite good content.
Technical SEO is one part of our full SEO services. If you're not sure where your problems lie, start with an SEO audit.
The technical areas we review and fix
Every site is different, but these are the areas where we most often find problems that limit rankings.
| Area | What commonly goes wrong | Why it matters |
|---|---|---|
| Crawlability | Important sections blocked in robots.txt, broken internal links, crawl traps from filters and calendars | Search engines can't find or efficiently reach your key pages |
| Indexation | Stray noindex tags, thin or duplicate pages indexed, key pages excluded | The wrong pages compete in search while the right ones are missing |
| Rendering | Content or links loaded only by JavaScript that crawlers don't execute reliably | Search engines may see an empty or incomplete page |
| Canonicalisation | Multiple URL versions (http/https, www, parameters, trailing slashes) without clear canonicals | Ranking signals are split across duplicates |
| Redirects and status codes | Redirect chains, loops, soft 404s, 302s where 301s are needed | Wasted crawl budget and lost link equity |
| Site architecture | Key pages buried many clicks deep, orphan pages, flat or chaotic structure | Authority doesn't flow to the pages that need it |
| Core Web Vitals | Slow largest contentful paint, poor interaction responsiveness (INP), layout shifts | Worse user experience and a weaker page experience signal |
| Mobile experience | Content hidden or broken on mobile, tiny tap targets, intrusive pop-ups | Google primarily uses the mobile version for indexing |
| Structured data | Missing, invalid or misleading schema markup | Missed rich results and weaker understanding of your content |
| International SEO | Incorrect or missing hreflang, wrong regional targeting | The wrong language or country version ranks |
| XML sitemaps | Outdated sitemaps listing redirected, noindexed or broken URLs | Mixed signals about which pages matter |
| Security | Mixed content, expired certificates, hacked or injected pages | Lost trust from both users and search engines |
Business benefits of technical SEO
Technical fixes rarely make headlines, but they often unlock the fastest gains on established websites.
- More pages indexed and ranking, so existing content finally earns traffic.
- Faster pages that keep visitors engaged and convert better.
- Stronger signals as authority concentrates on the right URLs.
- Protection during change, so redesigns and migrations don't cost you rankings.
- Better returns on content and links, because nothing is wasted on pages search engines can't use.
Our technical SEO capabilities
We diagnose, specify and, with access, implement fixes directly.
Full site crawls
Professional crawling tools map every URL, status code, directive, link and duplicate.
Search Console analysis
Indexing reports, crawl stats, page experience and enhancement reports interpreted and acted on.
Log file analysis
For larger sites, server logs show exactly how search engines crawl you and where they waste time.
JavaScript SEO
Rendering tests, server-side or static rendering recommendations, and link discoverability fixes.
Site architecture
Category structures, URL design, internal linking and navigation planned for users and crawlers.
Core Web Vitals
Diagnosing LCP, INP and CLS issues by template, with fixes for images, scripts, fonts and layout.
Structured data
Organization, Service, Product, Article, Breadcrumb, FAQ and LocalBusiness markup, validated and monitored.
Faceted navigation control
Rules for filters and parameters so useful combinations are indexable and the rest aren't.
International SEO
hreflang implementation, URL strategy and regional targeting for multi-market sites.
Migration planning
URL mapping, redirect plans, pre-launch checks and post-launch monitoring.
Developer specifications
Clear tickets with context, acceptance criteria and testing steps for your developers.
Monitoring and alerts
Ongoing checks that catch new issues, like accidental noindex tags, before they cost traffic.
Why choose MarquixAd for technical SEO?
Expertise
Specialists who understand how websites are built, not just how SEO tools report on them.
Strategy
Fixes prioritised by business impact, not the length of a tool's warnings list.
Technology
Professional crawlers, log analysis and rendering tests alongside Search Console.
Data
Every recommendation backed by evidence from your own site.
Execution
We implement directly where possible and write developer-ready specifications where not.
Optimisation
Fixes validated after release, then monitored.
Reporting
Plain-language explanations of technical problems and their business impact.
Communication
We work well with in-house developers and external agencies.
Scalability
From small business sites to large catalogues and multi-country setups.
Our technical SEO process
Crawl and collect
Full crawl, Search Console and analytics data, and server logs for larger sites.
Diagnose
Issues grouped by root cause, since one template bug can create thousands of symptoms.
Prioritise
Each issue scored for impact on traffic and revenue against effort to fix.
Specify
Clear fix instructions, with examples, acceptance criteria and testing steps.
Implement
Fixes applied by our team or yours, ideally tested on staging first.
Validate
Re-crawls and Search Console checks confirm each fix works as intended.
Monitor
Ongoing monitoring catches regressions and new issues quickly.
Website migrations without losing rankings
Redesigns, platform changes, domain moves and URL restructures are the riskiest moments in any website's SEO life. When old URLs disappear without proper redirects, or content and internal links change significantly, rankings built over years can drop sharply and take months to recover.
We protect migrations with a structured plan: a complete inventory of existing URLs with their traffic and links, a one-to-one redirect map to the most relevant new pages, preserved metadata and content where it performs, pre-launch testing on staging, launch-day checks, and close monitoring of indexing and rankings for weeks afterwards.
Involve SEO early. The best time to plan a migration is before designs are finalised, not the week before launch.
Working with your developers
- Tickets written in developers' language, with the "why" explained.
- Acceptance criteria so everyone knows when a fix is complete.
- Priority labels agreed with your product or tech lead.
- Testing on staging before changes go live.
- A single point of contact for technical questions.
What you receive
| Stage | Deliverables |
|---|---|
| Audit | Technical audit report with issues grouped by root cause; impact and effort ratings; crawl data exports |
| Roadmap | Prioritised fix list; developer tickets with acceptance criteria |
| Implementation | Fixes applied directly (with access) or supported through development |
| Validation | Post-fix crawl and Search Console confirmation |
| Ongoing (optional) | Monthly technical monitoring, alerts and health reports |
Relevant project experience
Selected technical SEO projects will appear here with the issues found, fixes implemented and verified changes in indexing and organic performance.
Technical SEO: frequently asked questions
Have a technical question? Ask our team.
What is included in technical SEO?
Crawlability, indexation, rendering, canonicalisation, redirects, site architecture, internal linking, page speed and Core Web Vitals, mobile usability, structured data, international setup, sitemaps and security.
How much do technical SEO services cost?
A technical audit is a fixed-price project based on site size and complexity. Implementation and ongoing monitoring are quoted separately, or included within a broader SEO retainer.
How long until technical fixes affect rankings?
Some fixes, like removing an accidental noindex, can show results within days of recrawling. Others, like architecture improvements, take weeks to months as search engines reprocess the site.
Do you implement fixes or just recommend them?
Both. With CMS or code access, we can implement many fixes directly. For complex or custom platforms, we write detailed specifications for your developers and validate their work.
What are Core Web Vitals?
Google's measures of real-user page experience: Largest Contentful Paint (loading), Interaction to Next Paint (responsiveness) and Cumulative Layout Shift (visual stability).
Is page speed a ranking factor?
Page experience is one of many signals, and relevance still matters most. But speed strongly affects user behaviour and conversions, so it's worth improving regardless.
Can JavaScript websites rank well?
Yes, if they're built so important content and links are available to crawlers, usually through server-side rendering or static generation. We test how search engines actually see your pages.
How do you handle a website migration?
With a URL inventory, redirect map, preserved content and metadata, staging tests, launch checks and post-launch monitoring. See the migrations section above.
What is crawl budget, and should we worry about it?
Crawl budget is how much search engines crawl your site in a given period. Most small sites needn't worry. It matters for large sites with many URL variations, where wasted crawling can delay indexing of important pages.
What access do you need?
Google Search Console and GA4 at minimum. CMS access, staging access and server logs help for deeper work.
How often should a technical audit be done?
A full audit at least annually, before any major site change, and whenever traffic drops unexpectedly. Ongoing monitoring catches issues in between.
Will technical SEO alone improve our rankings?
It removes barriers, which can produce significant gains on sites held back by technical problems. Sustained growth also needs relevant content and authority, which our wider SEO services cover.
Find out what's holding your site back
Get a free technical review with the most important issues we find.