What Does a Technical SEO Consultant Actually Fix?
Technical SEO covers the full infrastructure layer of how search engines discover, crawl, interpret, and index your website. Common issues — and the ones I regularly find even on well-maintained, large sites:
Crawlability and Indexation
Google can only rank pages it knows about. Crawl budget waste, disallowed pages, noindex tags applied incorrectly, canonical tags pointing to the wrong URLs, and robots.txt misconfiguration all prevent content from appearing in search results — even when that content is genuinely excellent.
The audit process maps exactly which pages Google is crawling, which it is ignoring, and why. Fixing crawlability issues is often the fastest route to ranking improvement because it unlocks content that already exists.
Site Architecture and Internal Linking
How pages link to each other determines how Google distributes authority across your site. Flat architectures, orphaned pages, crawl traps, and poor hub-and-spoke structures dilute link equity — meaning your most important commercial pages rank below their potential even when your overall site has strong authority.
Structural fixes to internal linking and site architecture can produce significant ranking improvements without any new content or links.
Core Web Vitals
Google uses Core Web Vitals — Largest Contentful Paint (LCP), Cumulative Layout Shift (CLS), and Interaction to Next Paint (INP) — as ranking signals. Sites that fail these metrics are measurably disadvantaged in competitive searches. The causes are almost always technical: render-blocking resources, unoptimised images, layout instability from late-loading elements, and poor server response times.
Schema Markup and Structured Data
Schema markup helps Google understand what your pages contain and makes your results eligible for rich snippets — star ratings, FAQs, product pricing, and other SERP enhancements that dramatically increase click-through rates. Missing, incorrect, or incomplete schema is extremely common, even on professionally built sites.
I implement full schema coverage using JSON-LD: LocalBusiness, Service, FAQPage, Article, BreadcrumbList, Person, and Organisation markup — correctly structured and validated.
Duplicate Content and Canonicalisation
Duplicate content — from URL parameter variations, session IDs, trailing slash inconsistencies, www/non-www splits, HTTP/HTTPS duplication, and CMS-generated URL variants — splits your ranking signals across multiple URLs instead of concentrating them on one. Canonicalisation resolves this and can produce immediate ranking improvements for pages previously fragmented across duplicates.
Page Speed and Core Technical Performance
Beyond Core Web Vitals, page speed affects user experience, crawl efficiency, and conversions. Render-blocking JavaScript, uncompressed images, missing caching headers, and poor hosting infrastructure are all fixable — and the improvements compound across every page on your site.
International SEO and Hreflang
For businesses targeting multiple countries or language variants, incorrect hreflang implementation causes serious indexation problems. Google serving the wrong language to the wrong market, duplicated indexation across regions, and hreflang return-tag errors are among the most technically complex issues I resolve.