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
-
I have two robots.txt pages for www and non-www version. Will that be a problem?
There are two robots.txt pages. One for www version and another for non-www version though I have moved to the non-www version.
Technical SEO | | ramb0 -
Crawl solutions for landing pages that don't contain a robots.txt file?
My site (www.nomader.com) is currently built on Instapage, which does not offer the ability to add a robots.txt file. I plan to migrate to a Shopify site in the coming months, but for now the Instapage site is my primary website. In the interim, would you suggest that I manually request a Google crawl through the search console tool? If so, how often? Any other suggestions for countering this Meta Noindex issue?
Technical SEO | | Nomader1 -
Good robots txt for magento
Dear Communtiy, I am trying to improve the SEO ratings for my website www.rijwielcashencarry.nl (magento). My next step will be implementing robots txt to exclude some crawling pages.
Technical SEO | | rijwielcashencarry040
Does anybody have a good magento robots txt for me? And what need i copy exactly? Thanks everybody! Greetings, Bob0 -
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 -
I accidentally blocked Google with Robots.txt. What next?
Last week I uploaded my site and forgot to remove the robots.txt file with this text: User-agent: * Disallow: / I dropped from page 11 on my main keywords to past page 50. I caught it 2-3 days later and have now fixed it. I re-imported my site map with Webmaster Tools and I also did a Fetch as Google through Webmaster Tools. I tweeted out my URL to hopefully get Google to crawl it faster too. Webmaster Tools no longer says that the site is experiencing outages, but when I look at my blocked URLs it still says 249 are blocked. That's actually gone up since I made the fix. In the Google search results, it still no longer has my page title and the description still says "A description for this result is not available because of this site's robots.txt – learn more." How will this affect me long-term? When will I recover my rankings? Is there anything else I can do? Thanks for your input! www.decalsforthewall.com
Technical SEO | | Webmaster1230 -
Does Bing ignore robots txt files?
Bonjour from "Its a miracle is not raining" Wetherby Uk 🙂 Ok here goes... Why despite a robots text file excluding indexing to site http://lewispr.netconstruct-preview.co.uk/ is the site url being indexed in Bing bit not Google? Does bing ignore robots text files or is there something missing from http://lewispr.netconstruct-preview.co.uk/robots.txt I need to add to stop bing indexing a preview site as illustrated below. http://i216.photobucket.com/albums/cc53/zymurgy_bucket/preview-bing-indexed.jpg Any insights welcome 🙂
Technical SEO | | Nightwing0 -
Can I Disallow Faceted Nav URLs - Robots.txt
I have been disallowing /*? So I know that works without affecting crawling. I am wondering if I can disallow the faceted nav urls. So disallow: /category.html/? /category2.html/? /category3.html/*? To prevent the price faceted url from being cached: /category.html?price=1%2C1000
Technical SEO | | tylerfraser
and
/category.html?price=1%2C1000&product_material=88 Thanks!0 -
Exact match subdomains
Hi, I have seen significant SEO benefits from owning exact match domains and was wondering whether exact match subdomains hold the same (or some) of these benefits? eg. halloweencostumes.co.uk vs. halloween [dot] costumes.co.uk Many thanks.
Technical SEO | | martyc0