Both Disallow in the robots.txt file and noindex serve to control how search engines interact with your content, but they function differently and have distinct use cases.
Here’s why you might choose one over the other.
The key differences
Disallow in the robots.txt file tells search engines not to visit certain areas of your site but there is no guarantee that the page won’t appear in search results.
Noindex, on the other hand, means the search engine can visit the page but shouldn’t include it in search results. It’s more definitive if you don’t want a page appearing in Google or other search engines.
What they both have in common though is that neither is a security measure to protect sensitive content.
When to use
Disallow in robots.txt
You would use the Disallow directive in your robots.txt when:
- You want to stop search engines from scraping content from specific areas of your site.
- You aim to reduce server load by preventing crawlers from visiting the disallowed sections.
- You’re looking to optimise your crawl budget to help your SEO (Search Engine Optimisation). What’s a crawl budget? It’s the quota set by search engines for how many of your site’s pages they will scan within a specific time period. Using Disallow helps to guide search engines towards the pages that are important to you, making the most out of this budget.
However, there’s a catch. Simply disallowing a page doesn’t guarantee it won’t be indexed. If other websites link to a disallowed page, search engines may still display the URL in results, but without much context or description.
Noindex
You would use the noindex tag when:
- You want a page to be completely omitted from search engine results, even if other sites link to it.
- You have content that is not representative of your site and shouldn’t influence how search engines rank you.
- You aim for more granular control over individual pages rather than entire sections, which is what Disallow in robots.txt is typically used for.
Unlike Disallow, noindex doesn’t save on server load or help optimise your crawl budget. It focuses solely on whether the page should appear in search engine results or not.
Don’t mix disallow and noindex
If you use Disallow, search engines won’t visit the page, so they won’t see the noindex tag. The page may still appear in search results if found through other routes.
If you don’t want a page showing up in search engine results, a noindex tag is the way to go.
If you really don’t want anyone to find your content, simply using disallow and noindex might not be the best choice. Incorporating password protection or server-side restrictions is the only way to truly block web crawlers.
Summary
Use Disallow when you want to prevent search engines from accessing and crawling specific content but are less concerned about it being indexed.
Use noindex when you’re okay with search engines accessing and crawling the content, but you don’t want it to appear in search results.
Whichever choice you select, it’s essential to be cautious. Improper use of ‘Disallow’ or ‘noindex’ can unintentionally hide vital content from search engines. This can result in decreased site visibility and reduced web traffic.
