Moz Q&A is closed.
After more than 13 years, and tens of thousands of questions, Moz Q&A closed on 12th December 2024. Whilst we’re not completely removing the content - many posts will still be possible to view - we have locked both new posts and new replies. More details here.
Disallow wildcard match in Robots.txt
-
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=1Thank you
-
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.
-
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 - PORTENTHope it helps.
Best luck.
GR
Got a burning SEO question?
Subscribe to Moz Pro to gain full access to Q&A, answer questions, and ask your own.
Browse Questions
Explore more categories
-
Moz Tools
Chat with the community about the Moz tools.
-
SEO Tactics
Discuss the SEO process with fellow marketers
-
Community
Discuss industry events, jobs, and news!
-
Digital Marketing
Chat about tactics outside of SEO
-
Research & Trends
Dive into research and trends in the search industry.
-
Support
Connect on product support and feature requests.
Related Questions
-
Robot.txt : How to block a specific file type in several subdirectories ?
Hello everyone ! I need help setting up a robot.txt. I'm trying to block all pdf files in particular directories so I'm using this command. In the example below the line is blocking all .gif in the entire site. Block files of a specific file type (for example, .gif) | Disallow: /*.gif$ 2 questions : Can I use this command to specify one particular directory in which I want to block pdf files ? Will this line be recognized by googlebots ? Disallow: /fileadmin/xxxxxxx/xxx/xxxxxxx/*.pdf$ Then I realized that I would have to write as many lines as many directories there are in which I want to block pdf files. Let's say I want to block pdf files in all these 3 directories /fileadmin/directory1 /fileadmin/directory1/sub1 /fileadmin/directory1/sub1/pdf Is there a pattern-matching rule I could use to blocks access to pdf files in all subdirectories instead of writing 3x the above line for each subdirectory ? For exemple : Disallow: /fileadmin/directory1*/ Many thanks in advance for any insight you may have.
Technical SEO | | LabeliumUSA0 -
Is sitemap required on my robots.txt?
Hi, I know that linking your sitemap from your robots.txt file is a good practice. Ok, but... may I just send my sitemap to search console and forget about adding ti to my robots.txt? That's my situation: 1 multilang platform which means... ... 2 set of pages. One for each lang, of course But my CMS (magento) only allows me to have 1 robots.txt file So, again: may I have a robots.txt file woth no sitemap AND not suffering any potential SEO loss? Thanks in advance, Juan Vicente Mañanas Abad
Technical SEO | | Webicultors0 -
Exact Match Domain & Title Tag / URL
I currently own an exact match domain for my keyword. I have it set up with multiple pages and also a blog. The home page essentially serves as a hub and contains links to all the pages and the blog. My targeted keyword is on its own page and I made the title tag the same as my keyword. As an example the URL for my targeted post looks like this: benefitsofrunningshoes.com/benefits-of-running-shoes I have solid, non-spammy content and clean whitehat earned backlinks directing to that specific page. My concern right now is that the URL looks kinda spammy. The website has been live for about a week and the home page ranks well enough but my targeted page is no where to be found. (it does show up if I manually search via search command "site:benefitsofrunningshoes.com"). I'm wondering if it is acceptable to use the exact keyword in title tag / page url if it is also in the domain as an EMD? Should I change the title tag and leave the URL in? Or should I completely change the title tag and URL and 301 redirect to the new page? I appreciate any help!
Technical SEO | | Kusanagi170 -
Robots.txt on subdomains
Hi guys! I keep reading conflicting information on this and it's left me a little unsure. Am I right in thinking that a website with a subdomain of shop.sitetitle.com will share the same robots.txt file as the root domain?
Technical SEO | | Whittie0 -
Block Domain in robots.txt
Hi. We had some URLs that were indexed in Google from a www1-subdomain. We have now disabled the URLs (returning a 404 - for other reasons we cannot do a redirect from www1 to www) and blocked via robots.txt. But the amount of indexed pages keeps increasing (for 2 weeks now). Unfortunately, I cannot install Webmaster Tools for this subdomain to tell Google to back off... Any ideas why this could be and whether it's normal? I can send you more domain infos by personal message if you want to have a look at it.
Technical SEO | | zeepartner0 -
301 Redirect with an Exact Domain name Match
My Client had a site that ranked for a pretty competitive two word phrase, but for a variety of reasons had to transfer the site to a different domain name (with none of the previous keywords). We've 301'd everything just fine to the new site, but our traffic for that two word phrase, as well as related long tail traffic, is beginning to drop. Could the drop be related to something that we didn't do well in the transfer? Or is it due to the new domain name now not being an exact match? Sitenote question: Our Google Analytics is still set up for the former domain name and shows data just fine. Is there any reason to switch GA to the new domain? What are the pros/cons? Much thanks in advance!
Technical SEO | | TrevorMcKendrick0 -
Robots.txt and canonical tag
In the SEOmoz post - http://www.seomoz.org/blog/robot-access-indexation-restriction-techniques-avoiding-conflicts, it's being said - If you have a robots.txt disallow in place for a page, the canonical tag will never be seen. Does it so happen that if a page is disallowed by robots.txt, spiders DO NOT read the html code ?
Technical SEO | | seoug_20050
