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 404 errors
I apologize in advance, but I am an SEO novice and my understanding of code is very limited. Moz has issued a lot (several hundred) of duplicate content and 404 error flags on the ecommerce site my company takes care of. For the duplicate content, some of the pages it says are duplicates don't even seem similar to me. additionally, a lot of them are static pages we embed images of size charts that we use as popups on item pages. it says these issues are high priority but how bad is this? Is this just an issue because if a page has similar content the engine spider won't know which one to index? also, what is the best way to handle these urls bringing back 404 errors? I should probably have a developer look at these issues but I wanted to ask the extremely knowledgeable Moz community before I do 🙂
Technical SEO | | AliMac260 -
Duplicate Content on a Page Due to Responsive Version
What are the implications if a web designer codes the content of the site twice into the page in order to make the site responsive? I can't add the url I'm afraid but the H1 and the content appear twice in the code in order to produce both a responsive version and a desktop version. This is a Wordpress site. Is Google clever enough to distinguish between the 2 versions and treat them individually? Or will Google really think that the content has been repeated on the same page?
Technical SEO | | Wagada0 -
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 -
Handling of Duplicate Content
I just recently signed and joined the moz.rainyclouds.online system. During the initial report for our web site it shows we have lots of duplicate content. The web site is real estate based and we are loading IDX listings from other brokerages into our site. If though these listings look alike, they are not. Each has their own photos, description and addresses. So why are they appear as duplicates – I would assume that they are all too closely related. Lots for Sale primarily – and it looks like lazy agents have 4 or 5 lots and input the description the same. Unfortunately for us, part of the IDX agreement is that you cannot pick and choose which listings to load and you cannot change the content. You are either all in or you cannot use the system. How should one manage duplicate content like this? Or should we ignore it? Out of 1500+ listings on our web site it shows 40 of them are duplicates.
Technical SEO | | TIM_DOTCOM0 -
Duplicate content problem from an index.php file
Hi One of my sites is flagging a duplicate content problem which is affecting the search rankings. The duplicate problem is caused by http://www.mydomain.com/index.php which has a page rank of 26 How can I sort the duplicate content problem, as the main page should just be http://www.mydomain.com which has a page rank of 42 and is the stronger page with stronger links etc Many Thanks
Technical SEO | | ocelot0 -
Whats with the backslash in the url adding as duplicate content?
Is this a bug or something that needs to be addressed? If so, just use a redirect?
Technical SEO | | Boogily0 -
Are recipes excluded from duplicate content?
Does anyone know how recipes are treated by search engines? For example, I know press releases are expected to have lots of duplicates out there so they aren't penalized. Does anyone know if recipes are treated the same way. For example, if you Google "three cheese beef pasta shells" you get the first two results with identical content.
Technical SEO | | RiseSEO0
