Technical SEO Checklist for B2B Websites in 2026

Technical SEO in 2026: what actually matters

Technical SEO has expanded significantly over the past five years. Where it once focused primarily on crawlability and indexation, it now encompasses Core Web Vitals, structured data, mobile experience, and site architecture. This checklist is organised by priority — the items at the top have the highest impact on organic visibility.

Indexation and crawlability

• Verify your sitemap.xml is submitted in Google Search Console and contains no errors
• Confirm all important pages are returning 200 status codes (no unintended 301 chains or soft 404s)
• Check robots.txt is not accidentally blocking important pages or assets
• Ensure canonical tags are correctly implemented — especially on paginated content or faceted navigation
• Confirm that important pages are not accidentally set to noindex
• Check internal links are using absolute or consistent relative URLs, not broken or redirected paths

Core Web Vitals

• LCP (Largest Contentful Paint) under 2.5 seconds on mobile
• CLS (Cumulative Layout Shift) under 0.1
• INP (Interaction to Next Paint) under 200ms
• All pages assessed in Google PageSpeed Insights, not just the homepage
• No render-blocking resources delaying the main thread

Structured data

• Organisation schema on the homepage with name, URL, logo, contact point, and sameAs social profiles
• BreadcrumbList schema on all interior pages
• Article schema on all blog posts including headline, datePublished, dateModified, author, image
• FAQPage schema on relevant service and landing pages
• All schema validated in Google's Rich Results Test with zero errors

On-page SEO fundamentals

• Every page has a unique, keyword-rich title tag under 60 characters
• Every page has a unique meta description under 160 characters that reads like a natural sentence
• Each page has exactly one H1 that includes the primary keyword
• H2–H4 hierarchy is logical and supports topic clusters
• Images have descriptive, keyword-relevant alt text (not empty or generic)
• Internal links use descriptive anchor text, not "click here" or "read more"

URL structure

• All URLs are lowercase, hyphen-separated, and free of stop words
• No dynamic parameters in URLs for crawlable content
• URL structure reflects the site hierarchy (e.g. /services/web-development/saas)
• No trailing slashes inconsistency — pick one convention and enforce it consistently

HTTPS and security

• All pages are served over HTTPS with a valid SSL certificate
• No mixed content warnings (HTTP assets loaded on HTTPS pages)
• HSTS header is implemented
• No sensitive pages indexed that should require authentication

Mobile and international

• Site passes Google's mobile usability test with zero errors
• Viewport meta tag is correctly implemented
• If targeting multiple countries, hreflang tags are implemented correctly
• Font sizes are at least 16px for body text on mobile