CGI Parameters: should we worry about duplicate content?
-
Hi,
My question is directed to CGI Parameters. I was able to dig up a bit of content on this but I want to make sure I understand the concept of CGI parameters and how they can affect indexing pages.
Here are two pages:
No CGI parameter appended to end of the URL:
http://www.nytimes.com/2011/04/13/world/asia/13japan.html
CGI parameter appended to the end of the URL:
http://www.nytimes.com/2011/04/13/world/asia/13japan.html?pagewanted=2&ref=homepage&src=mv
Questions:
Can we safely say that CGI parameters = URL parameters that append to the end of a URL? Or are they different? And given that you have rel canonical implemented correctly on your pages, search engines will move ahead and index only the URL that is specified in that tag?
Thanks in advance for giving your insights. Look forward to your response.
Best regards,
Jackson
-
Since it is a duplicate and meant for mobile devices, then yes, I would use a canonical tag or even noindex if you don't want it in the index anyway. Either method would eliminate the duplicate content problem.
-
The page content is the exact same, the the layout is built for a mobile device. So in essence we don't know why it would be indexed, unless that happens for mobile browsing pages...
So the solution is to put a rel-canonical tag on that trailing parameter page to prevent duplicate content.
-
Is the page with device=iphone&c=y different than example.html? If not, you should make sure to add the canonical tag to it. If it is different, then you shouldn't add it because it's not a duplicate.
-
Hi Steve,
Another thing I came across... a page with trailing parameters like ?device=iphone&c=y is rendering a different set of code. So we have the original page with the content, and then we have www.example.html?device=iphone&c=y. The one with the trailing parameter doesn't have a canonical tag attached to it, but it's indexed in Google (when we search the www.example.html URL) it shows up as number two.
Do you have any insights into this? Will this be a duplicate content issue?
Thanks!
Jackson
-
Thank you Steve for your response. I had come across Dr. Pete's post in the past but forgot about it. Nonetheless, the CGI parameter explanation and the use of canonical tags answers my question.
Jackson
-
Yes, you can say CGI parameters = URL parameters. I don't think many people refer to them as CGI parameters anymore though.
To answer your question, yes, as long as you have rel canonical set up correctly, then the URL parameters won't hurt your indexing.
For example, if you have your rel canonical set to http://mysite.com/japan.html
Then, only that page will be indexed, even if there are various parameters such as
http://mysite.com/japan.html?source=something&whateva=somethingelse
Just MAKE SURE to setup rel canonical correctly because it can be bad if you don't. Check out Dr. Pete's post about this: http://www.seomoz.org/blog/catastrophic-canonicalization
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 and Subdirectories
Hi there and thank you in advance for your help! I'm seeking guidance on how to structure a resources directory (white papers, webinars, etc.) while avoiding duplicate content penalties. If you go to /resources on our site, there is filter function. If you filter for webinars, the URL becomes /resources/?type=webinar We didn't want that dynamic URL to be the primary URL for webinars, so we created a new page with the URL /resources/webinar that lists all of our webinars and includes a featured webinar up top. However, the same webinar titles now appear on the /resources page and the /resources/webinar page. Will that cause duplicate content issues? P.S. Not sure if it matters, but we also changed the URLs for the individual resource pages to include the resource type. For example, one of our webinar URLs is /resources/webinar/forecasting-your-revenue Thank you!
Technical SEO | | SAIM_Marketing0 -
Duplicate content question...
I have a high duplicate content issue on my website. However, I'm not sure how to handle or fix this issue. I have 2 different URLs landing to the same page content. http://www.myfitstation.com/tag/vegan/ and http://www.myfitstation.com/tag/raw-food/ .In this situation, I cannot redirect one URL to the other since in the future I will probably be adding additional posts to either the "vegan" tag or the "raw food tag". What is the solution in this case? Thank you
Technical SEO | | myfitstation0 -
Duplicate Content Issue
My issue with duplicate content is this. There are two versions of my website showing up http://www.example.com/ http://example.com/ What are the best practices for fixing this? Thanks!
Technical SEO | | OOMDODigital0 -
How to solve Parameter Issue causing Duplicate Content
Hi everyone, My site home page comes up in SERP with following url www.sitename/?referer=indiagrid My question is:- Should I disallow using robots.txt.? or 301 redirect to the home page Other issue is i have few dynamic generated URL's for a form http://www.www.sitename/career-form.php?position=SEO Executive I am using parameter "position" in URL Parameter in GWT. But still my pages are indexed that is leading to duplicate page content. Please help me out.
Technical SEO | | himanshu3019890 -
How to prevent duplicate content at a calendar page
Hi, I've a calender page which changes every day. The main url is
Technical SEO | | GeorgFranz
/calendar For every day, there is another url: /calendar/2012/09/12
/calendar/2012/09/13
/calendar/2012/09/14 So, if the 13th september arrives, the content of the page
/calendar/2012/09/13
will be shown at
/calendar So, it's duplicate content. What to do in this situation? a) Redirect from /calendar to /calendar/2012/09/13 with 301? (but the redirect changes the day after to /calendar/2012/09/14) b) Redirect from /calendar to /calendar/2012/09/13 with 302 (but I will loose the link juice of /calendar?) c) Add a canonical tag at /calendar (which leads to /calendar/2012/09/13) - but I will loose the power of /calendar (?) - and it will change every day... Any ideas or other suggestions? Best wishes, Georg.0 -
Bad Duplicate content issue
Hi, for grappa.com I have about 2700 warnings of duplicate page content. My CMS generates long url like: http://www.grappa.com/deu/news.php/categoria=latest_news/idsottocat=5 and http://www.grappa.com/deu/news.php/categoria%3Dlatest_news/idsottocat%3D5 (this is a duplicated content). What's the best solution to fix this problem? Do I have to set up a 301 redirect for all the duplicated pages or insert the rel=canonical or rel=prev,next ? It's complicated becouse it's a multilingual site, and it's my first time dealing with this stuff. Thanks in advance.
Technical SEO | | nico860 -
How critical is Duplicate content warnings?
Hi, So I have created my first campaign here and I have to say the tools, user interface and the on-page optimization, everything is useful and I am happy with SEOMOZ. However, the crawl report returned thousands of errors and most of them are duplicate content warnings. As we use Drupal as our CMS, the duplicate content is caused by Drupal's pagination problems. Let's say there is a page called "/top5list" , the crawler decided /top5list?page=1" to be duplicate of "/top5list". There is no real solution for pagination problems in Drupal (as far as I know). I don't have any warnings in Google's webmaster tools regarding this and my sitemap I submitted to Google doesn't include those problematic deep pages. (that are detected as duplicate content by SEOMOZ crawler) So my question is, should I be worried about the thousands of error messages in crawler diagnostics? any ideas appreciated
Technical SEO | | Gamer070 -
Forget Duplicate Content, What to do With Very Similar Content?
All, I operate a Wordpress blog site that focuses on one specific area of the law. Our contributors are attorneys from across the country who write about our niche topic. I've done away with syndicated posts, but we still have numerous articles addressing many of the same issues/topics. In some cases 15 posts might address the same issue. The content isn't duplicate but it is very similar, outlining the same rules of law etc. I've had an SEO I trust tell me I should 301 some of the similar posts to one authoritative post on the subject. Is this a good idea? Would I be better served implementing canonical tags pointing to the "best of breed" on each subject? Or would I be better off being grateful that I receive original content on my niche topic and not doing anything? Would really appreciate some feedback. John
Technical SEO | | JSOC0