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Technical SEO Issues

Website setup or code problems that prevent search engines from crawling, rendering, indexing, or ranking pages correctly are technical SEO issues.

If you have ever fixed a broken link and seen no ranking change, you already know technical SEO issues are not a single fix.

Key points

  • Fix crawlability and indexation problems before optimising speed or on site content — these are the most impactful seo issues.
  • Use Google Search Console to find indexing errors, Core Web Vitals issues, and on site mobile usability problems.
  • Check robots.txt and noindex directives to ensure important pages are not accidentally blocked.
  • Consolidate duplicate URLs with 301 redirects or canonical tags to avoid splitting ranking signals.

A noindex tag that killed organic traffic

An e-commerce site with 10,000 product pages accidentally applied a noindex tag via a theme update. Google indexed only 200 pages, and organic traffic dropped 80%. A technical audit using Google Search Console revealed the issue. After removing the noindex, crawl requests increased 50% and indexed pages reached 8,000 within two weeks. Organic sessions recovered to pre-drop levels in one month.

Three common technical SEO mistakes

  • Blocking important pages A broad disallow rule in robots.txt or an accidental noindex tag can remove entire site sections from search results, wasting crawl budget and losing traffic.
  • Duplicate URL versions Multiple URLs serving the same content split ranking signals and confuse search engines, so you need a clear canonical or 301 redirect strategy to consolidate them.
  • Ignoring performance Performance problems like slow page speed or poor Core Web Vitals can prevent pages from qualifying for top rankings even if the content is strong and well-optimised.

Three tools to detect technical SEO issues

  • Google Search Console Reports on indexing status, Core Web Vitals, mobile usability, and manual actions, making it the primary tool for finding technical SEO problems.
  • Crawling tools Find broken links, redirect chains, orphan pages, and metadata errors across the site, helping you prioritise fixes that improve crawl efficiency.
  • Page-speed tools Measure Core Web Vitals metrics like LCP, FID, and CLS to identify performance bottlenecks that affect user experience and search rankings.

Common questions

How do you do technical SEO?

Start with a crawl audit using tools like Google Search Console. Then fix crawlability, indexation, canonicals, and performance issues in that order.

How do you find SEO errors on a website?

Use Google Search Console for indexing and Core Web Vitals reports, and a crawler for broken links, redirects, and metadata issues.

Sources

  1. Google Search Central Official documentation on crawling, indexing, and technical guidelines.
  2. Moz Blog posts and guides on technical SEO audits and best practices.
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