Robots.txt & Duplicate Content
-
In reviewing my crawl results I have 5666 pages of duplicate content. I believe this is because many of the indexed pages are just different ways to get to the same content. There is one primary culprit. It's a series of URL's related to CatalogSearch - for example; http://www.careerbags.com/catalogsearch/result/index/?q=Mobile
I have 10074 of those links indexed according to my MOZ crawl. Of those 5349 are tagged as duplicate content. Another 4725 are not.
Here are some additional sample links:
http://www.careerbags.com/catalogsearch/result/index/?dir=desc&order=relevance&p=2&q=Amy
http://www.careerbags.com/catalogsearch/result/index/?color=28&q=bellemonde
http://www.careerbags.com/catalogsearch/result/index/?cat=9&color=241&dir=asc&order=relevance&q=baggalliniAll of these links are just different ways of searching through our product catalog. My question is should we disallow - catalogsearch via the robots file? Are these links doing more harm than good?
-
For product pages, I would canonical the page with the most descriptive URL.
For category pages, I agree with you, I would noindex them.
I think I just answered my own question!!
-
Oke, the question concerning rel="canonical" is which URL becomes the canonical version? Since there is no page on the website which would be appropiate (as far as i've seen) i recommended the meta robots tag.
I do agree that rel="canonical" is the preferred option, but in this situation i can't see a way to implement it properly. Which page would you highlight as the canonical?
-
I agree entirely that "Search result pages are too varied to be included in the index".
That said, my understanding is that if you canonical a page, it doesn't get indexed. So we wouldn't have to worry about the appearance / user-friendliness of the URL. But (again, in my opinion) we should still worry about link equity being passed, and that won't happen if you noindex.
This gets complicated fast. I like your solution b/c it's a lot cleaner and easier to implement. Still not convinced it's the "best" way to go though.
-
Where is the evidence that these work? I have never seen them work. Google totally ignores the URL parameters tools in GWTs.
-
I do agree that a rel="canonical" is good option for the problem that's at hand.
As jeremy has stated however the link we are referring to in the href section redirects to the home page. http://www.careerbags.com/catalogsearch/result/index/In my original answer i did not test this. I assumed there would be a list of all products here not filtered by search results. Since this is not the case and this page in fact does not exist it's hard to point at a url to be canonical.
Therefor i changed my answer to include the robots meta tag. This would indeed remove the search pages from the search index. I do think this is a positive thing though.
Look at the following url: http://www.careerbags.com/catalogsearch/result/?q=rolling+laptop+bags
Not really the type of URL i would click on in the search results. The following URL however is something i would want to click on: http://www.careerbags.com/laptop-bags/women-s/rolling-laptop-bags.html
Search result pages are too varied to be included in the index to my opinion.
Hope you agree with this, if not then i would like to hear your thoughts on this.
-
Simon, Wesley, Michael...
These customer facing search result pages are the ones often bookmarked and shared by site visitors. How worried does one need to be about losing link equity? I realize every site is going to be different and social shares don't have link equity - at least for now - but this could add up over time. The rel canonical will enable capture of link equity whereas the robots noindex will not.
Am I over thinking this?
-
In this case you could add the meta robots tag on the search result pages like this:
content="noindex, follow">
Search results can indeed spawn an infinite amount of different URL's. This can be avoided by making sure they are not included in the index but are followed.
-
Webmaster guidelines specifically request that you prevent crawling of search results pages using a robots.txt file. The relevant section reads: "Use robots.txt to prevent crawling of search results pages or other auto-generated pages that don't add much value for users coming from search engines."
-
There are 2 distinct possible issues here
1. Search results are creating duplicate content
2. Search results are creating lots of thin content
You want to give the user every possibility of finding your products, but you don't want those search results indexed because you should already have your source product page indexed and aiming to rank well. If not see last paragraph.
I slightly misread your post and took the URLs to be purely filtered. You should add disallow /catalogsearch to your robots.txt and if any are indexed you can remove the directory in Webmaster Tools > Google Index > Remove URLs > Reason: Remove Directory. This from Google - http://www.mattcutts.com/blog/search-results-in-search-results/
If your site has any other parameters not in that directory you can add them in Webmaster Tools > Crawl > URL Parameters > Let Googlebot Decide. Google will understand they are not the main URLs and treat them accordingly.
As a side issue with your search results it would be a good idea to analyse them in Analytics. You might find you have a trend, maybe something searched for or not the perfect match for the returned result, where you can create new more targeted content.
-
I'm not sure this is the right approach. The catalog search is based on the search box on the website. The query parameter can be anything the customer enters. Are you suggesting that the backend code be modified to always return the in every result?
And why that page because that URL just redirects to the home page because there is no query parameter provided for the search.
In terms o losing link equity, how much equity do they have it they are duplicate content?
-
Hi Jeremy.
Yours is a common problem. The best way to deal with it is, as Wesley mentions, by putting canonical tags on all the duplicate pages - the one you want indexed and to show up in search results AND all the others that you can arrive at via catalog search or any other means of navigation.
Michael's suggestion will prevent the duplicate pages from getting indexed by Google. Unfortunately you lose any link equity going that route, so I'd suggest starting with canonical tags first.
-
To back up the detail Wesley gave you, you can also add URL parameters in Google Webmaster Tools
-
You could add a canonical tag to link to the default page. This way Google will know that it should only index that.
The code for this would be:This should be placed in the section of your HTML code.
Some more resources on the subject:
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
-
Duplicate Content
Let's say a blog is publishing original content. Now let's say a second blog steals that original content via bot and publishes it as it's own. Now further assume the original blog doesn't notice this for several years. How much damage could this do to blog A for Google results? Any opinions?
Intermediate & Advanced SEO | | CYNOT0 -
Penalty for duplicate content on the same website?
Is it possible to get a penalty for duplicate content on the same website? I have a old custom-built site with a large number of filters that are pre-generated for speed. Basically the only difference is the meta title and H1 tag, with a few text differences here and there. Obviously I could no-follow all the filter links but it would take an enormous amount of work. The site is performing well in the search. I'm trying to decide whether if there is a risk of a penalty, if not I'm loath to do anything in case it causes other issues.
Intermediate & Advanced SEO | | seoman100 -
Google robots.txt test - not picking up syntax errors?
I just ran a robots.txt file through "Google robots.txt Tester" as there was some unusual syntax in the file that didn't make any sense to me... e.g. /url/?*
Intermediate & Advanced SEO | | McTaggart
/url/?
/url/* and so on. I would use ? and not ? for example and what is ? for! - etc. Yet "Google robots.txt Tester" did not highlight the issues... I then fed the sitemap through http://www.searchenginepromotionhelp.com/m/robots-text-tester/robots-checker.php and that tool actually picked up my concerns. Can anybody explain why Google didn't - or perhaps it isn't supposed to pick up such errors? Thanks, Luke0 -
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 -
Duplicate Content in News Section
Our clients site is in the hunting niche. According to webmaster tools there are over 32,000 indexed pages. In the new section that are 300-400 news posts where over the course of a about 5 years they manually copied relevant Press Releases from different state natural resources websites (ex. http://gfp.sd.gov/news/default.aspx). This content is relevant to the site visitors but it is not unique. We have since begun posting unique new posts but I am wondering if anything should be done with these old news posts that aren't unique? Should I use the rel="canonical tag or noindex tag for each of these pages? Or do you have another suggestion?
Intermediate & Advanced SEO | | rise10 -
Duplicate Content | eBay
My client is generating templates for his eBay template based on content he has on his eCommerce platform. I'm 100% sure this will cause duplicate content issues. My question is this.. and I'm not sure where eBay policy stands with this but adding the canonical tag to the template.. will this work if it's coming from a different page i.e. eBay? Update: I'm not finding any information regarding this on the eBay policy's: http://ocs.ebay.com/ws/eBayISAPI.dll?CustomerSupport&action=0&searchstring=canonical So it does look like I can have rel="canonical" tag in custom eBay templates but I'm concern this can be considered: "cheating" since rel="canonical is actually a 301 but as this says: http://googlewebmastercentral.blogspot.com/2009/12/handling-legitimate-cross-domain.html it's legitimately duplicate content. The question is now: should I add it or not? UPDATE seems eBay templates are embedded in a iframe but the snap shot on google actually shows the template. This makes me wonder how they are handling iframes now. looking at http://www.webmaster-toolkit.com/search-engine-simulator.shtml does shows the content inside the iframe. Interesting. Anyone else have feedback?
Intermediate & Advanced SEO | | joseph.chambers1 -
Cross-Domain Canonical and duplicate content
Hi Mozfans! I'm working on seo for one of my new clients and it's a job site (i call the site: Site A).
Intermediate & Advanced SEO | | MaartenvandenBos
The thing is that the client has about 3 sites with the same Jobs on it. I'm pointing a duplicate content problem, only the thing is the jobs on the other sites must stay there. So the client doesn't want to remove them. There is a other (non ranking) reason why. Can i solve the duplicate content problem with a cross-domain canonical?
The client wants to rank well with the site i'm working on (Site A). Thanks! Rand did a whiteboard friday about Cross-Domain Canonical
http://www.seomoz.org/blog/cross-domain-canonical-the-new-301-whiteboard-friday0 -
Removing Duplicate Content Issues in an Ecommerce Store
Hi All OK i have an ecommerce store and there is a load of duplicate content which is pretty much the norm with ecommerce store setups e.g. this is my problem http://www.mystoreexample.com/product1.html
Intermediate & Advanced SEO | | ChriSEOcouk
http://www.mystoreexample.com/brandname/product1.html
http://www.mystoreexample.com/appliancetype/product1.html
http://www.mystoreexample.com/brandname/appliancetype/product1.html
http://www.mystoreexample.com/appliancetype/brandname/product1.html so all the above lead to the same product
I also want to keep the breadcrumb path to the product Here's my plan Add a canonical URL to the product page
e.g. http://www.mystoreexample.com/product1.html
This way i have a short product URL Noindex all duplicate pages but do follow the internal links so the pages are spidered What are the other options available and recommended? Does that make sense?
Is this what most people are doing to remove duplicate content pages? thanks 🙂0