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.
Blocking Dynamic URLs with Robots.txt
-
Background:
My e-commerce site uses a lot of layered navigation and sorting links. While this is great for users, it ends up in a lot of URL variations of the same page being crawled by Google. For example, a standard category page:
...which uses a "Price" layered navigation sidebar to filter products based on price also produces the following URLs which link to the same page:
http://www.mysite.com/widgets.html?price=1%2C250
http://www.mysite.com/widgets.html?price=2%2C250
http://www.mysite.com/widgets.html?price=3%2C250
As there are literally thousands of these URL variations being indexed, so I'd like to use Robots.txt to disallow these variations.
Question:
-
Is this a wise thing to do? Or does Google take into account layered navigation links by default, and I don't need to worry.
-
To implement, I was going to do the following in Robots.txt:
User-agent: *
Disallow: /*?
Disallow: /*=
....which would prevent any dynamic URL with a '?" or '=' from being indexed. Is there a better way to do this, or is this a good solution?
Thank you!
-
-
If you are happy with any URLs with query strings not being indexed your robots.txt will work fine.
Do any or your URLs with question marks in them have links to them? If so you might want to be careful blocking google from indexing them. I would think you'd lose the benefits those links would pass to your site.
-
Tait,
Thanks for the answer. I think the canonical tag would be ideal, but in terms of implementation, it would require some substantial code modification to the site / PHP code as I have a lot of categories, and adding this manually to each one would be very time consuming.
Would preventing the spiders from indexing any URLs with a "?" or "&" (which would only be dynamic URLs variations) cause any problems? Or is this just not an ideal best practice?
Thanks!
-
I don't know if there's a good solution with robots.txt given your URL structure. However, you could use the rel=canonical link tag in the header to force google to treat many of your URLs the same way. This would help you avoid duplicate content penalties.
More on rel=canonical:
http://www.google.com/support/webmasters/bin/answer.py?answer=139394
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
-
Inactive Products - Inactive URLs
Hi, In our website www.viatrading.com we have many products that might be in stock or not depending on availability. Until now, when a product was not available anymore, we took this page down (and redirected to its product category page). And, only if the product was available again, we re-activated the URL - this might be days, months or even years later. To make this more SEO-friendly, we decided now that while a product is not available, instead or deactivating/redirecting the page, we will leave it online and just add a message saying "This product is currently not available". If we do this, we will automatically re-activate about 500 products pages at once. 1. Just to make sure, is it harmful for SEO to keep activating/deactivating URLs this way? 2. Since most of these pages have been deindexed for a long time due to being redirected - have they lost all their SEO juice? 3. How can we better activate these old 500 pages - is it ok activating them all at once? Thank you,
Intermediate & Advanced SEO | | viatrading11 -
URL Rewriting Best Practices
Hey Moz! I’m getting ready to implement URL rewrites on my website to improve site structure/URL readability. More specifically I want to: Improve our website structure by removing redundant directories. Replace underscores with dashes and remove file extensions for our URLs. Please see my example below: Old structure: http://www.widgets.com/widgets/commercial-widgets/small_blue_widget.htm New structure: https://www.widgets.com/commercial-widgets/small-blue-widget I've read several URL rewriting guides online, all of which seem to provide similar but overall different methods to do this. I'm looking for what's considered best practices to implement these rewrites. From what I understand, the most common method is to implement rewrites in our .htaccess file using mod_rewrite (which will find the old URLs and rewrite them according to the rewrites I implement). One question I can't seem to find a definitive answer to is when I implement the rewrite to remove file extensions/replace underscores with dashes in our URLs, do the webpage file names need to be edited to the new format? From what I understand the webpage file names must remain the same for the rewrites in the .htaccess to work. However, our internal links (including canonical links) must be changed to the new URL format. Can anyone shed light on this? Also, I'm aware that implementing URL rewriting improperly could negatively affect our SERP rankings. If I redirect our old website directory structure to our new structure using this rewrite, are my bases covered in regards to having the proper 301 redirects in place to not affect our rankings negatively? Please offer any advice/reliable guides to handle this properly. Thanks in advance!
Intermediate & Advanced SEO | | TheDude0 -
"noindex, follow" or "robots.txt" for thin content pages
Does anyone have any testing evidence what is better to use for pages with thin content, yet important pages to keep on a website? I am referring to content shared across multiple websites (such as e-commerce, real estate etc). Imagine a website with 300 high quality pages indexed and 5,000 thin product type pages, which are pages that would not generate relevant search traffic. Question goes: Does the interlinking value achieved by "noindex, follow" outweigh the negative of Google having to crawl all those "noindex" pages? With robots.txt one has Google's crawling focus on just the important pages that are indexed and that may give ranking a boost. Any experiments with insight to this would be great. I do get the story about "make the pages unique", "get customer reviews and comments" etc....but the above question is the important question here.
Intermediate & Advanced SEO | | khi50 -
Robots.txt: Can you put a /* wildcard in the middle of a URL?
We have noticed that Google is indexing the language/country directory versions of directories we have disallowed in our robots.txt. For example: Disallow: /images/ is blocked just fine However, once you add our /en/uk/ directory in front of it, there are dozens of pages indexed. The question is: Can I put a wildcard in the middle of the string, ex. /en/*/images/, or do I need to list out every single country for every language in the robots file. Anyone know of any workarounds?
Intermediate & Advanced SEO | | IHSwebsite0 -
URL Error or Penguin Penalty?
I am currently having a major panic as our website www.uksoccershop.com has been largely dropped from Google. We have not made any changes recently and I am not sure why this is happening, but having heard all sorts of horror stories of penguin update, I am fearing the worst. If you google "uksoccershop" you will see that the homepage does not rank. We previously ranked in the top 3 for "football shirts" but now we don't, although on page 2, 3 and 4 you will see one of our category pages ranking (this didn't used to happen). Some rankings are intact, but many have disappeared completely and in some cases been replaced by other pages on our site. I should point out our existing rankings have been consistently there for 5-6 years until today. I logged into webmaster tools and thankfully there is no warning message from Google about spam, etc, but what we do have is 35,000 URL errors for pages which are accessible. An example of this is: | URL: | http://www.uksoccershop.com/categories/5_295_327.html | | Error details In Sitemaps Linked from Last crawled: 6/20/12First detected: 6/15/12Googlebot couldn't access the contents of this URL because the server had an internal error when trying to process the request. These errors tend to be with the server itself, not with the request. Is it possible this is the cause of the issue (we are not currently sure why the URL's are being blocked) and if so, how severe is it and how recoverable?If that is unlikely to cause the issue, what would you recommend our next move is?All help is REALLY REALLY appreciated 🙂
Intermediate & Advanced SEO | | ukss19840 -
Exact keyword URL or not?
Hi all, I have a quick question about the proper use of permalinks. Let's say that I have a website about sports and I want to create an internal page dedicated to shoes. I know that the keyword "shoe" has 15.000 monthly visits, while the keyword "shoes" has 1.000 monthly visits. How do I have to name the internal page? http://www.example.com/shoe or http://www.example.com/shoes (with a final 's')? I would think that by naming the URL http://www.example.com/shoes, the search engine would consider that page for the keywords "shoe" and "shoes", but I am not sure about it. Should I create a URL that only focuses on one specific keyword ("shoe", in this example) or a URL that may encompass more than one keyword ("shoe" and "shoes")? I hope this is clear. Thank you for your time and help. All best, Sal
Intermediate & Advanced SEO | | salvyy0 -
Robots.txt is blocking Wordpress Pages from Googlebot?
I have a robots.txt file on my server, which I did not develop, it was done by the web designer at the company before me. Then there is a word press plugin that generates a robots.txt file. How Do I unblock all the wordpress pages from googlebot?
Intermediate & Advanced SEO | | ENSO0 -
URL Shorteners. Are they SEO Friendly?
Do URL shortener services like bit.ly act as 301 redirects? I was thinking about utilizing one for longer query based URLs and didn't want to risk losing link juice. Thanks for the insight! Regards - Kyle
Intermediate & Advanced SEO | | kchandler0