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
-
Robots.txt Syntax for Dynamic URLs
I want to Disallow certain dynamic pages in robots.txt and am unsure of the proper syntax. The pages I want to disallow all include the string ?Page= Which is the proper syntax?
Technical SEO | | btreloar
Disallow: ?Page=
Disallow: ?Page=*
Disallow: ?Page=
Or something else?0 -
Should I block Map pages with robots.txt?
Hello, I have a website that was started in 1999. On the website I have map pages for each of the offices listed on my site, for which there are about 120. Each of the 120 maps is in a whole separate html page. There is no content in the page other than the map. I know all of the offices love having the map pages so I don't want to remove the pages. So, my question is would these pages with no real content be hurting the rankings of the other pages on our site? Therefore, should I block the pages with my robots.txt? Would I also have to remove these pages (in webmaster tools?) from Google for blocking by robots.txt to really work? I appreciate your feedback, thanks!
Technical SEO | | imaginex0 -
Blocked jquery in Robots.txt, Any SEO impact?
I've heard that Google is now indexing links and stuff available in javascript and jquery. My webmastertools is showing that some links are blocked in robots.txt of jquery. Sorry I'm not a developer or designer. I want to know is there any impact of this on my SEO? and also how can I unblock it for the robots? Check this screenshot: http://i.imgur.com/3VDWikC.png
Technical SEO | | hammadrafique0 -
Disallow: /404/ - Best Practice?
Hello Moz Community, My developer has added this to my robots.txt file: Disallow: /404/ Is this considered good practice in the world of SEO? Would you do it with your clients? I feel he has great development knowledge but isn't too well versed in SEO. Thank you in advanced, Nico.
Technical SEO | | niconico1011 -
Removing robots.txt on WordPress site problem
Hi..am a little confused since I ticked the box in WordPress to allow search engines to now crawl my site (previously asked for them not to) but Google webmaster tools is telling me I still have robots.txt blocking them so am unable to submit the sitemap. Checked source code and the robots instruction has gone so a little lost. Any ideas please?
Technical SEO | | Wallander0 -
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 -
301 Redirect "wildcard" question
I have been looking at the SEOmoz redirect guide for some advice but I can't seem to find the answer : http://www.seomoz.org/learn-seo/redirection I have lots of URLs from a previous version of a site that look like the following: sitename.com/-c-25.html?sort=2d&page=1 sitename.com/-c-25.html?sort=3a&page=1 etc etc. I want to write a redirect so whenever a URL with the terms "-c-25.html" is requested it redirects to a specified page, regardless of what comes after the question mark. These URLs were created by our previous ecommerce software. The 'c' is for category, and each page of the cateogry created a different URL. I want to do these so I can rediect all of these URLs to the appropraite new cateogry page in a single redirect. Thanks for any help.
Technical SEO | | craigycraig0