SEA, SEO
NoIndex
NoIndex can be placed as a so-called meta tag in the source code of a web page. Search engines understand this tag as a request not to index the page for the search results. A page with a NoIndex tag therefore does not appear in the Google search results.
If you do not want entire directories of the website to be crawled by Bots at all, this can be handled via the robots.txt file. This also helps to optimize the Crawl-Budget of the site.
Typical candidates are thank-you and confirmation pages, internal search results, test environments, and thin content pages that provide no value to searchers.
A common mistake: setting NoIndex and blocking the same page via robots.txt at the same time. Then the bot cannot access it at all and never reads the instruction. If you want to remove a page from the index, you allow crawling and set NoIndex.
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