What Is Technical SEO
Technical SEO is the optimization of a website’s infrastructure to help search engines find, crawl, understand, and index its pages efficiently.
Unlike on-page SEO (content and keywords) and off-page SEO (links), technical SEO works “under the hood.” Users don’t see this work, but it creates the foundation for rankings.
Key Areas of Technical SEO
Crawling and Indexing
- robots.txt — manages crawler access
- Sitemap.xml — a map of pages for search engines
- Canonical tags — eliminate duplicates
- Crawl budget — use the crawl budget efficiently
- Internal linking — links between pages on the site
Speed and Performance
- Core Web Vitals — LCP, INP, CLS
- TTFB — server speed
- Compression — Gzip/Brotli
- Caching — browser and server caching
- CDN — content delivery
Mobile Optimization
- Mobile-first indexing — Google indexes the mobile version
- Responsive design — a design that adapts to different screen sizes
- Viewport meta tag — correct display
- Touch target sizes — ease of interaction
Security
- HTTPS — SSL certificate
- HSTS — enforces the use of HTTPS
- Security headers — CSP, X-Frame-Options
Structured Data
- Schema.org — markup for rich results
- JSON-LD — markup format
- Open Graph — for social networks
Technical On-Page Factors
- URL structure — clean, readable URLs
- Redirects — 301 for permanent moves
- HTTP status codes — correct 200/301/404
- Hreflang — for multilingual websites
Technical SEO Checklist
Краулинг:
[ ] robots.txt не блокирует важные страницы
[ ] Sitemap.xml актуален и отправлен в GSC
[ ] Нет orphan pages (страниц без ссылок)
[ ] Crawl depth <= 3-4 клика от главной
Скорость:
[ ] LCP <= 2.5 сек
[ ] INP <= 200 мс
[ ] CLS <= 0.1
[ ] TTFB <= 200 мс
[ ] Gzip/Brotli включён
Безопасность:
[ ] HTTPS работает
[ ] HTTP → HTTPS редирект
[ ] HSTS заголовок
[ ] Валидный SSL сертификат
Контент:
[ ] Нет 404 ошибок для важных страниц
[ ] Нет технических дублей URL
[ ] Canonical теги правильные
[ ] Meta robots не блокирует нужные страницы
Technical SEO Priorities
Start with critical issues:
- Indexing — make sure important pages are in the index
- HTTPS — without it, Google marks the site as not secure
- Speed — especially the mobile version
- Duplicates — canonical tags and redirects
- Structured data — for rich results
Full Check on reChecker
Use Full Website Check for a comprehensive technical audit. The tool will check all key technical parameters and provide specific recommendations for fixing issues.
FAQ
Is technical SEO only needed for large websites? No. Even a small website should have HTTPS, a correctly configured robots.txt, a sitemap, and basic loading speed. Technical issues affect any website, regardless of size.
Technical SEO or content—which is more important? They are interconnected. Great content on a technically broken website won’t rank. A technically perfect website without content won’t either. Start with a technical foundation, then create content.
How often should you conduct a technical audit? A quarterly audit is recommended, along with real-time monitoring of key metrics (Google Search Console, uptime and performance monitoring systems).