SEO: How to Do Technical SEO for New Websites 2026

New website technical SEO establishes the foundation for everything else.
Getting it right at launch prevents costly fixes later.

Pre-Launch Technical Checklist

HTTPS: SSL certificate installed. All pages serve over https://.
Without HTTPS: "Not Secure" browser warning. Negative ranking signal.

www vs. non-www: Pick one. Ensure the other redirects to it.
301 redirect: non-www.example.com -> www.example.com (or vice versa).
Consistency: All internal links use the canonical version.

Robots.txt: Exists at /robots.txt. Review content.
Common mistake: Development site's robots.txt (Disallow: /) accidentally left in production.
Check: After launch. Ensure important pages are not blocked.

Sitemap.xml: Generated. Submitted to GSC.
Include: All important, indexable URLs.

Canonical tags: Every page has a self-referencing canonical.
CMS: WordPress with Yoast/Rank Math does this automatically.

Post-Launch Technical Tasks

Submit to Google: GSC URL inspection -> Request indexing for key pages.
Submit sitemap: GSC -> Sitemaps.
Verify GSC: Property verified. Data starts flowing within 24-48 hours.

Check Core Web Vitals: PageSpeed Insights for homepage and key landing pages.
Fix: Any LCP above 2.5s before significant traffic arrives.

Internal link structure: Homepage links to most important pages.
No orphaned pages: Every page reachable from at least one internal link.

Mobile Test

Google's Mobile-Friendly Test: Run for homepage and key pages.
Any mobile usability errors: Fix before significant indexing.

Technical SEO for new websites and launch checklist: yositeup.com