What is the Noindex Attribute? – Definition
The noindex tag is used to avoid indexing of a given website or page in the search engine (they will not appear in the search results). When Google robots crawl a particular page and find this directive, they will remove it from the search results.
How to Correctly Add Noindex Tag to a Website?
To block indexing by most search engine crawlers, place the following directive into the <head> section:
To block only Google robots from indexing, place the following directive into the <head> section:
Remember not to block the page by a robots.txt file, otherwise, this directive will not be effective – crawlers simply won’t see it and as a result, the page will still remain in the search engine index.
Noindex can also be added as an HTTP response header.