Robots.txt Syntax
-
I have been having a hard time finding any decent information regarding the robots.txt syntax that has been written in the last few years and I just want to verify some things as a review for myself. I have many occasions where I need to block particular directories in the URL, parameters and parameter values. I just wanted to make sure that I am doing this in the most efficient ways possible and thought you guys could help.
So let's say I want to block a particular directory called "this" and this would be an example URL:
www.domain.com/folder1/folder2/this/file.html
or
www.domain.com/folder1/this/folder2/file.htmlIn order for me to block any URL that contains this folder anywhere in the URL I would use:
User-agent: *
Disallow: /this/Now lets say I have a parameter "that" I want to block and sometimes it is the first parameter and sometimes it isn't when it shows up in the URL. Would it look like this?
User-agent: *
Disallow: ?that=
Disallow: &that=What about if there is only one value I want to block for "that" and the value is "NotThisGuy":
User-agent: *
Disallow: ?that=NotThisGuy
Disallow: &that=NotThisGuyMy big questions here are what are the most efficient ways to block a particular parameter and block a particular parameter value. Is there a more efficient way to deal with ? and & for when the parameter and value are either first or later? Secondly is there a list somewhere that will tell me all of the syntax and meaning that can be used for a robots.txt file?
Thanks!
-
My advice is to go easy with robots.txt--it's a bit like dynamite, powerful, but can take your leg (or entire website) off.
I like this checker:
http://tool.motoricerca.info/robots-checker.phtml
If you look ok after running that checker, then use the built-in Google one.
Note that robots.txt syntax DOES NOT have wildcards. Apparently this doesn't stop a ton of people from using wildcards in them (to no effect, and clearly they didn't bother to test!).
Another reason to avoid disallow in robots.txt is that if you disallow the engines from looking at a page's contents, then you're ALSO stopping the link juice that might have flowed to other pages it links to.
So let's say you have 100 pages on your site that you're currently blocking with disallow in robots.txt. If instead, you put a meta robots "noindex,follow" in each of those pages, then every page linked to from those 100 pages (i.e. everything in your main menu) would get an extra 100 internal links worth of link juice.
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 & Disallow: /*? Question!
Hi, I have a site where they have: Disallow: /*? Problem is we need the following indexed: ?utm_source=google_shopping What would the best solution be? I have read: User-agent: *
Intermediate & Advanced SEO | | vetofunk
Allow: ?utm_source=google_shopping
Disallow: /*? Any ideas?0 -
Need help with Robots.txt
An eCommerce site built with Modx CMS. I found lots of auto generated duplicate page issue on that site. Now I need to disallow some pages from that category. Here is the actual product page url looks like
Intermediate & Advanced SEO | | Nahid
product_listing.php?cat=6857 And here is the auto generated url structure
product_listing.php?cat=6857&cPath=dropship&size=19 Can any one suggest how to disallow this specific category through robots.txt. I am not so familiar with Modx and this kind of link structure. Your help will be appreciated. Thanks1 -
Search engine blocked by robots-crawl error by moz & GWT
Hello Everyone,. For My Site I am Getting Error Code 605: Page Banned by robots.txt, X-Robots-Tag HTTP Header, or Meta Robots Tag, Also google Webmaster Also not able to fetch my site, tajsigma.com is my site Any expert Can Help please, Thanx
Intermediate & Advanced SEO | | falguniinnovative0 -
Question about Syntax in Robots.txt
So if I want to block any URL from being indexed that contains a particular parameter what is the best way to put this in the robots.txt file? Currently I have-
Intermediate & Advanced SEO | | DRSearchEngOpt
Disallow: /attachment_id Where "attachment_id" is the parameter. Problem is I still see these URL's indexed and this has been in the robots now for over a month. I am wondering if I should just do Disallow: attachment_id or Disallow: attachment_id= but figured I would ask you guys first. Thanks!0 -
Meta Robot Tag:Index, Follow, Noodp, Noydir
When should "Noodp" and "Noydir" meta robot tag be used? I have hundreds or URLs for real estate listings on my site that simply use "Index", Follow" without using Noodp and Noydir. Should the listing pages use these Noodp and Noydr also? All major landing pages use Index, Follow, Noodp, Noydir. Is this the best setting in terms of ranking and SEO. Thanks, Alan
Intermediate & Advanced SEO | | Kingalan10 -
Baidu Spider appearing on robots.txt
Hi, I'm not too sure what to do about this or what to think of it. This magically appeared in my companies robots.txt file (literally magically appeared/text is below) User-agent: Baiduspider
Intermediate & Advanced SEO | | IceIcebaby
User-agent: Baiduspider-video
User-agent: Baiduspider-image
Disallow: / I know that Baidu is the Google of China, but I'm not sure why this would appear in our robots.txt all of a sudden. Should I be worried about a hack? Also, would I want to disallow Baidu from crawling my companies website? Thanks for your help,
-Reed0 -
Robots.txt help
Hi Moz Community, Google is indexing some developer pages from a previous website where I currently work: ddcblog.dev.examplewebsite.com/categories/sub-categories Was wondering how I include these in a robots.txt file so they no longer appear on Google. Can I do it under our homepage GWT account or do I have to have a separate account set up for these URL types? As always, your expertise is greatly appreciated, -Reed
Intermediate & Advanced SEO | | IceIcebaby0 -
Robots.txt: how to exclude sub-directories correctly?
Hello here, I am trying to figure out the correct way to tell SEs to crawls this: http://www.mysite.com/directory/ But not this: http://www.mysite.com/directory/sub-directory/ or this: http://www.mysite.com/directory/sub-directory2/sub-directory/... But with the fact I have thousands of sub-directories with almost infinite combinations, I can't put the following definitions in a manageable way: disallow: /directory/sub-directory/ disallow: /directory/sub-directory2/ disallow: /directory/sub-directory/sub-directory/ disallow: /directory/sub-directory2/subdirectory/ etc... I would end up having thousands of definitions to disallow all the possible sub-directory combinations. So, is the following way a correct, better and shorter way to define what I want above: allow: /directory/$ disallow: /directory/* Would the above work? Any thoughts are very welcome! Thank you in advance. Best, Fab.
Intermediate & Advanced SEO | | fablau1