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        4. Disallow wildcard match in Robots.txt

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        Disallow wildcard match in Robots.txt

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        • AmandaBridge
          AmandaBridge last edited by

          This is in my robots.txt file, does anyone know what this is supposed to accomplish, it doesn't appear to be blocking URLs with question marks

          Disallow: /?crawler=1
          Disallow: /
          ?mobile=1

          Thank you

          1 Reply Last reply Reply Quote 0
          • effectdigital
            effectdigital @GastonRiera last edited by

            This is a good reply.

            Everyone gets really confused because Robots.txt has very minor, partial wildcard support and that makes people think that Robots.txt files use Regex, which they do not. Instead of having some weird half and half implementation, it would be much better IMO if the Robots.txt initiative / directive were updated to say "yes, you can use full regular expressions with regards to URL string matching".

            Many people are left in a kind of silly guessing game because Google doesn't 'properly' elaborate or invest in expanding the definitions to their currently (publicly) assumed end-game.

            People assume that if "*" will match any string of characters, "?" will match any individual character when used in a robots.txt file. This would make sense, but it's not the case. AFAIK there are only one or two supported wildcard characters in Robots.txt and that's why people get confused, looking for escape characters and the suchlike.

            1 Reply Last reply Reply Quote 0
            • GastonRiera
              Gaston Riera last edited by

              Hi Amanda,

              Those lines tell GoogleBot not to crawl urls that have that text fragments.
              For example, wont crawl: domain.com/category/product**?mobile=1**

              BUT, that doesnt mean that will not crawl every URL with question marks. For that, the line should be like this:
              Disallow: /*?

              I do highly recommend you to read this guides:
              About /robots.txt - Official site - Robotstxt.org
              Robots.txt - Moz
              Robots.txt: the ultimate guide - YOAST
              The Complete Guide to Robots.txt - PORTENT

              Hope it helps.
              Best luck.
              GR

              effectdigital 1 Reply Last reply Reply Quote 1
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