Technical SEO is mostly about removing confusion for search engines. These are the 3 things that prevent indexing/ranking issues.
1) Canonical tags
- Use one canonical URL per page.
- Remove tracking params from canonicals.
- Ensure canonical matches the final URL after redirects.
2) Noindex (use carefully)
Use noindex for thin pages (filter pages, internal search results) that don’t provide unique value.
3) Structured data (schema)
- Add BreadcrumbList for better SERP clarity.
- Add Article schema for blog posts.
- Validate using Rich Results Test.
Common mistakes
- Multiple canonicals
- Noindex + canonical conflicts
- Schema with wrong URLs/IDs
Fixing these improves crawl efficiency and helps rankings become more stable over time.