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
-
Recurring events and duplicate content
Does anyone have tips on how to work in an event system to avoid duplicate content in regards to recurring events? How do I best utilize on-page optimization?
Technical SEO | | megan.helmer0 -
Duplicate Content Issues with Pagination
Hi Moz Community, We're an eCommerce site so we have a lot of pagination issues but we were able to fix them using the rel=next and rel=prev tags. However, our pages have an option to view 60 items or 180 items at a time. This is now causing duplicate content problems when for example page 2 of the 180 item view is the same as page 4 of the 60 item view. (URL examples below) Wondering if we should just add a canonical tag going to the the main view all page to every page in the paginated series to get ride of this issue. https://www.example.com/gifts/for-the-couple?view=all&n=180&p=2 https://www.example.com/gifts/for-the-couple?view=all&n=60&p=4 Thoughts, ideas or suggestions are welcome. Thanks
Technical SEO | | znotes0 -
Car Dealership website - Duplicate Page Content Issues
Hi, I am currently working on a large car dealership website. I have just had a Moz crawl through and its flagging a lot of duplicate page content issues, these are mostly for used car pages. How can I get round this as the site stocks many of the same car, model, colour, age, millage etc. Only unique thing about them is the reg plate. How do I get past this duplicate issue if all the info is relatively the same? Anyone experienced this issue when working on a car dealership website? Thank you.
Technical SEO | | karl621 -
Duplicate content through product variants
Hi, Before you shout at me for not searching - I did and there are indeed lots of threads and articles on this problem. I therefore realise that this problem is not exactly new or unique. The situation: I am dealing with a website that has 1 to N (n being between 1 and 6 so far) variants of a product. There are no dropdown for variants. This is not technically possible short of a complete redesign which is not on the table right now. The product variants are also not linked to each other but share about 99% of content (obvious problem here). In the "search all" they show up individually. Each product-variant is a different page, unconnected in backend as well as frontend. The system is quite limited in what can be added and entered - I may have some opportunity to influence on smaller things such as enabling canonicals. In my opinion, the optimal choice would be to retain one page for each product, the base variant, and then add dropdowns to select extras/other variants. As that is not possible, I feel that the best solution is to canonicalise all versions to one version (either base variant or best-selling product?) and to offer customers a list at each product giving him a direct path to the other variants of the product. I'd be thankful for opinions, advice or showing completely new approaches I have not even thought of! Kind Regards, Nico
Technical SEO | | netzkern_AG0 -
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 -
How to deal with duplicated content on product pages?
Hi, I have a webshop with products with different sizes and colours. For each item I have a different URL, with almost the same content (title tag, product descriptions, etc). In order to prevent duplicated content I'am wondering what is the best way to solve this problem, keeping in mind: -Impossible to create one page/URL for each product with filters on colour and size -Impossible to rewrite the product descriptions in order to be unique I'm considering the option to canonicolize the rest of de colours/size variations, but the disadvantage is that in case the product is not in stock it disappears from the website. Looking forward to your opinions and solutions. Jeroen
Technical SEO | | Digital-DMG0 -
Mod Rewrite / .htaccess avoid duplicate content
I have been searching and testing for hours but cannot find a solution. I am able to get a URL to display with out the file exntension. i.e domain.com/file instead of domain.com/file.php The problem is both versions of the URL above work, therefore a duplicate content issue. How can I force the URL with the file extension not to resolve and give a 404 error? Or just redirect to the non extension URL? IF it helps here is my code. Options +FollowSymLinks
Technical SEO | | MiamiWebCompany
RewriteEngine On RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME}.php -f
RewriteRule ^(.+)$ $1.php [L,QSA]0 -
Duplicate content and http and https
Within my Moz crawl report, I have a ton of duplicate content caused by identical pages due to identical pages of http and https URL's. For example: http://www.bigcompany.com/accomodations https://www.bigcompany.com/accomodations The strange thing is that 99% of these URL's are not sensitive in nature and do not require any security features. No credit card information, booking, or carts. The web developer cannot explain where these extra URL's came from or provide any further information. Advice or suggestions are welcome! How do I solve this issue? THANKS MOZZERS
Technical SEO | | hawkvt10