Search engines must find and store your content before it can appear in search results. That process has two parts: crawling (finding pages) and indexing (storing them). If your site isn’t crawlable or indexable, good content alone won’t help.
What is crawling?
Crawling is when search engine bots follow links across your site to discover pages. They use:
- Navigation menus
- Sitemaps
- Internal links
- Clean URLs
If search engines can’t crawl your site, they can’t rank it.
What is indexing?
Once a page is crawled, it must be indexed: stored in the search engine’s database, evaluated, and prepared for ranking. A page that isn’t indexed is effectively invisible in search.
What helps crawlability
- Clear navigation
A logical menu helps both bots and visitors.
- Internal linking
Links between related pages help search engines understand structure and importance.
- XML sitemap
A roadmap of your pages submitted in Search Console.
- Simple URL structure
Avoid unnecessary parameters and long, messy URLs.
- Fast hosting
Slow sites get fewer crawl attempts. See [How hosting affects technical SEO](/insights/technical-seo/how-hosting-affects-technical-seo/).
What hurts crawlability
- Broken links
- Redirect chains
- Duplicate content without canonicals
- Orphan pages (no internal links)
- Large, slow pages
- Incorrect robots.txt that blocks important pages
Robots.txt and canonicals
Robots.txt – Tells search engines what to crawl and what to skip. Make sure you’re not accidentally blocking key pages.
Canonical tags – Point duplicate or similar pages to the preferred URL so search engines know which version to index.
Next steps
If search engines can find and understand your content, you’ve solved half the SEO puzzle. The rest is content quality and authority.
For structure that supports both, see Structured data and schema basics. For a full checklist, see Technical SEO checklist.
Want crawl, index, or structure issues fixed? Explore SEO foundations →