robots.txt vs noindex: which one should you use?

robots.txt and noindex are often treated as if they do the same job, but they solve different problems. robots.txt is mainly about crawl access, while noindex is about keeping a page out of search results after it has been crawled or seen by search systems.

If the page should stay accessible but not appear in search, noindex is usually the clearer choice. If the page should simply be harder for crawlers to reach, robots.txt can help. Using the wrong one usually creates confusion later because the signal does not match the real outcome you wanted.

The safest approach is to decide the actual goal first, then pick the signal that matches it. That keeps crawl control, indexing, and cleanup much easier to reason about when the site grows.

Use this guide when you want a little more context before publishing, need a quick refresher on best practices, or want to avoid the mistakes that commonly lead to crawl or indexing issues later.