Technical SEO is about making it as easy as possible for search engines to find, understand, and trust your website. This checklist is meant as a practical walkthrough, not a guarantee of specific search results — no credible source can promise rankings, and this article doesn't either.
Crawlability
Search engines need to be able to reach your pages by following links. Check that important pages are actually linked from somewhere on the site (no "orphan pages") and that nothing accidentally blocks crawling in robots.txt.
Indexability
A page can be crawlable but still excluded from the index via a noindex tag. Regularly check that your important pages are actually indexable, especially after major site changes.
Raw HTML and JavaScript rendering
If content is rendered with JavaScript, verify that search engines actually see the finished content — not just an empty shell. Server-side rendering or prerendering (which this site uses) is a robust way to ensure the raw HTML contains the actual content directly, per Google's official JavaScript SEO documentation.
Title and meta description
Every page should have a unique, descriptive page title and meta description. Duplicated or missing titles/descriptions are one of the most common technical SEO mistakes on business websites.
Canonical tags
A self-referencing canonical tag on every page helps search engines understand which URL is the "real" version, especially important with parameters, filters, or duplicate content.
Hreflang
For multilingual sites, hreflang tags tell search engines which language version belongs with which, avoiding the wrong language version being shown to the wrong visitor. See Google's hreflang documentation for the technical details.
Sitemap
A correct, up-to-date XML sitemap helps search engines discover all important pages, especially on larger sites. The sitemap should only include pages you actually want indexed.
Robots.txt
robots.txt controls which parts of the site search engines may crawl. A common mistake is accidentally blocking the entire site after a migration — always check the file after major changes.
HTTP status codes
Pages should respond with the correct status code: 200 for working pages, a thoughtful 404 for pages that don't exist, and correct 301 redirects for permanently moved content (not 302 for permanent moves).
Structured data
Structured data (schema.org, e.g. Article, BreadcrumbList, Organization) helps search engines understand content more precisely and can produce richer search results. Always validate structured data with Google's Rich Results Test.
Core Web Vitals
Core Web Vitals measure actual user-experienced performance — load time, interactivity, and visual stability. Measure regularly via Google Search Console or PageSpeed Insights, not just once at launch.
Mobile usability
With mobile-first indexing, how the site works on mobile is decisive, not an afterthought. Test on actual mobile devices, not just a shrunken desktop window.
Image optimization
Compressed images in the right format, with width/height attributes to avoid layout shift, and descriptive alt text for accessibility and image SEO.
Redirects
Keep redirect chains short (ideally a single 301, not several in a row) and document every permanent redirect so it isn't accidentally removed during future site changes.
Search Console
Google Search Console is the most reliable source for how Google actually sees your site — indexing status, search queries, and technical errors. Check it regularly, not just when something breaks.
Ongoing monitoring
Technical SEO isn't a one-time effort. Monitor indexing status, Core Web Vitals, and crawl errors on an ongoing basis, especially after major site changes.
Important to remember
Working through this checklist doesn't guarantee specific rankings — technical SEO is a prerequisite for being seen, not a promise of a particular position. Search engine ranking factors are numerous and change over time.
How Irozon can help
Irozon builds websites with technical SEO built in from the ground up — correct hreflang, structured data, sitemaps, and performance optimization. See our web development and IT support and cloud services, or get in touch for a review of your current website.