Advanced SEO (1/5): Technical SEO — Crawl, Index & Performance

Advanced SEO & Web Analytics Series — Part 1/5
Next: Part 2 — On-page & Content · Part 3 — Off-page & Local · Part 4 — GA4 & GSC · Part 5 — Behavior & CRO

Many businesses publish content and run ads, but Google never indexes their pages — or slow load times waste all on-page effort. Technical SEO is the mandatory first layer.

TechPartner ships technical SEO by default on business websites built with Next.js: sitemap, robots, schema, performance. This post explains why and gives an audit checklist.

What is Technical SEO?

Techniques that help search engines:

1. Crawl — bots can reach pages
2. Index — pages enter the search index
3. Understand — titles, schema, headings clarify topic
4. Rank — compete on quality + experience

Skip steps 1–2 and even great content won't appear on Google.

Technical SEO checklist 2026

HTTPS & security

• Valid SSL, HTTP → HTTPS redirects
• No mixed content
• Basic security headers

Robots.txt & sitemap

• Allow important paths, block admin/demo
• Submit sitemap.xml in Search Console

Index & canonical

• One canonical URL per page
• Fix www/non-www duplicates
• noindex on thank-you pages, filters

URL architecture

• Short, keyword-rich slugs
• Important pages ≤ 3 clicks from home
• Strong internal linking

→ Business website structure

Mobile-first & Core Web Vitals

Metric	Target
LCP	≤ 2.5s
INP	≤ 200ms
CLS	≤ 0.1

→ Core Web Vitals guide

Structured data

• Organization / LocalBusiness — homepage
• BlogPosting — articles
• FAQPage — FAQ sections
• Service — service pages

JavaScript & rendering

• SSR/SSG (Next.js) beats client-only SPAs for SEO
• Critical content in initial HTML

Audit tools

Tool	Use
Google Search Console	Index, CWV, sitemap
PageSpeed Insights	Performance scores
Screaming Frog	On-site crawl
Rich Results Test	Schema validation

Common mistakes

1. Staging indexed by Google
2. Redirect chains
3. Mass 404s after redesign
4. Thin tag pages indexed
5. Slow hosting without CDN

---

Next: Part 2 — On-page SEO & content strategy

Contact TechPartner for a technical SEO audit.