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.
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 -
Query Strings causing Duplicate Content
I am working with a client that has multiple locations across the nation, and they recently merged all of the location sites into one site. To allow the lead capture forms to pre-populate the locations, they are using the query string /?location=cityname on every page. EXAMPLE - www.example.com/product www.example.com/product/?location=nashville www.example.com/product/?location=chicago There are thirty locations across the nation, so, every page x 30 is being flagged as duplicate content... at least in the crawl through MOZ. Does using that query string actually cause a duplicate content problem?
Technical SEO | | Rooted1 -
Duplicate content on Product pages for different product variations.
I have multiple colors of the same product, but as a result I'm getting duplicate content warnings. I want to keep these all different products with their own pages, so that the color can be easily identified by browsing the category page. Any suggestions?
Technical SEO | | bobjohn10 -
Localized domains and duplicate content
Hey guys, In my company we are launching a new website and there's an issue it's been bothering me for a while. I'm sure you guys can help me out. I already have a website, let's say ABC.com I'm preparing a localized version of that website for the uk so we'll launch ABC.co.uk Basically the websites are going to be exactly the same with the difference of the homepage. They have a slightly different proposition. Using GeoIP I will redirect the UK traffic to ABC.co.uk and the rest of the traffic will still visit .com website. May google penalize this? The site itself it will be almost the same but the homepage. This may count as duplicate content even if I'm geo-targeting different regions so they will never overlap. Thanks in advance for you advice
Technical SEO | | fabrizzio0 -
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 -
How to resolve this Duplicate content?
Hi , There is page i get when i do proper menu navigation Caratlane.com>jewellery>rings>casualsrings> http://www.caratlane.com/jewellery/rings/casual-rings/leaves-dew-diamond-0-03-ct-peridot-1-ct-ring-18k-yellow-gold.html When i do a site search in my search box by my product code number "JR00219" The same page is appears with different url http://www.caratlane.com/leaves-dew-diamond-0-03-ct-peridot-1-ct-ring-18k-yellow-gold.html So there is a duplicate content. How can we resolve it. Regards, kathir caratlane.com
Technical SEO | | kathiravan0 -
How much to change to avoid duplicate content?
Working on a site for a dentist. They have a long list of services that they want us to flesh out with text. They provided a bullet list of services, we're trying to get 1 to 2 paragraphs of text for each. Obviously, we're not going to write this off the top of our heads. We're pulling text from other sources and trying to rework. The question is, how much rephrasing do we have to do to avoid a duplicate content penalty? Do we make sure there are changes per paragraph, sentence, or phrase? Thanks! Eric
Technical SEO | | ericmccarty0 -
Block Quotes and Citations for duplicate content
I've been reading about the proper use for block quotes and citations lately, and wanted to see if I was interpreting it the right way. This is what I read: http://www.pitstopmedia.com/sem/blockquote-cite-q-tags-seo So basically my question is, if I wanted to reference Amazon or another stores product reviews, could I use the block quote and citation tags around their content so it doesn't look like duplicate content? I think it would be great for my visitors, but also to the source as I am giving them credit. It would also be a good source to link to on my products pages, as I am not competing with the manufacturer for sales. I could also do this for product information right from the manufacturer. I want to do this for a contact lens site. I'd like to use Acuvue's reviews from their website, as well as some of their product descriptions. Of course I have my own user reviews and content for each product on my website, but I think some official copy could do well. Would this be the best method? Is this how Rottentomatoes.com does it? On every movie page they have 2-3 sentences from 50 or so reviews, and not much unique content of their own. Cheers, Vinnie
Technical SEO | | vforvinnie1