Website Development SEO
Website development SEO is the practice of building and coding a site so search engines can crawl, understand, and index its pages efficiently while users get fast, accessible, well-structured content.
What I’d do first
- Ensure every important page is reachable via crawlable links (no JS-only navigation).
- Submit a current XML sitemap to Search Console.
- Use semantic HTML and keep text content in the DOM.
- Add canonical tags to consolidate duplicate URLs.
- Test with JavaScript disabled to see what Google sees.
I used to think SEO was all about keywords and backlinks—until I realized the foundation is how you build the site itself.
What I'd do first
- Check crawlability: Open your site in a browser with JavaScript disabled. Can you still navigate to every important page? If not, you've got a problem.
- Submit a sitemap: Generate an XML sitemap and submit it in Google Search Console. Keep it updated when you add or remove pages.
- Review robots.txt: Make sure you're not accidentally blocking important pages. Use the robots.txt tester in Search Console.
- Add canonical tags: For any page that could be accessed via multiple URLs (e.g., with and without www, HTTP vs HTTPS), add a self-referencing canonical tag.
- Check page speed: Run a PageSpeed Insights test on your top pages. Focus on LCP, FID, and CLS.
Plain-English take
Think of your website like a library. Website development SEO is making sure the librarian (Googlebot) can find every book (page), read the title and summary (title tag and meta description), and understand what each book is about (semantic HTML and structured data). If you build a library with locked doors, missing labels, or books hidden behind curtains, the librarian can't do their job—and visitors won't find what they need.
When it actually matters
- Launching a new site: Get the foundation right from day one. Retrofixing crawl issues is painful.
- Redesigning or migrating: Any change to URLs, navigation, or CMS can break crawl paths. Plan ahead.
- Adding JavaScript-heavy features: Single-page apps and dynamic content need special care to ensure Google can see and index everything.
- Seeing traffic drops or indexation issues: If pages aren't showing up in search, start with crawlability and sitemaps.
- Competing in a crowded space: When everyone has good content, technical polish can be the edge that gets you ranked.
What I got wrong
- Thinking JavaScript was fine out of the box: I assumed Google could render everything. Turns out, if content isn't in the initial HTML, it might not get indexed. Now I always test with JS disabled.
- Ignoring orphan pages: I'd build great content but forget to link to it from anywhere. Google can't find what isn't linked. Now I audit internal links regularly.
- Blocking staging sites with robots.txt and forgetting: I once blocked a whole production site because I copied a staging robots.txt. Always double-check before launch.
- Not using canonical tags: I had multiple URLs for the same product page (with tracking parameters, session IDs, etc.) and wondered why rankings were split. Canonical tags fixed it.
Next step
Quick answers
What is website development SEO?
Website development SEO is the practice of building and coding a website so that search engines can crawl, understand, and index its pages efficiently, while also providing a fast and accessible user experience.
Why is crawlability important in web development?
Crawlability ensures search engines can discover and access all important pages on your site. Without it, pages may not appear in search results, regardless of content quality.
What are Core Web Vitals?
Core Web Vitals are a set of performance metrics (LCP, FID, CLS) that measure user experience. They are a ranking factor, so optimizing them is part of website development SEO.
If you liked this
Sources
- Google Search Central: SEO Guide for Web Developers — Primary source for crawlability, semantic HTML, DOM accessibility, sitemaps, titles, and indexing controls.
- Google Search Central: SEO Starter Guide — Canonical Google guidance on site discovery, metadata, content quality, and Search Console monitoring.
- Google Search Central: Core Web Vitals — Best source for page experience metrics and current performance guidance.
- Google Search Central: Structured data overview — Official reference for JSON-LD and how structured data helps search understanding.
Notes from Callum Bennett.