How and When Should I use Canonical Url Tags?
-
Pretty new to the SEO universe. But I have not used any canonical tags, just because there is not definitive source explaining exactly when and why you should use them??? Am I the only one who feels this way?
-
Hi,
Canonical tags are used when there is the same content in different locations of your website. For example, If you have a blog post that is also available in a printable version, you would want to put rel=canonical tag that points to the original piece of content (to tell search engines that you want them to show that original piece and forget about the printable version).
Please read this guide from Moz. It will explain everything you need to about canonicalization.
I hope this helps!
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
-
Pages canonicaled to another appearing before the canonical on google searches
Hello, When I do this google search, this page(amandine roses category) appears before the one it is canonical-ed to(this multi-product version of amandine roses). This happens often with this multi-product template, where they don't rank as well as their category version(that are canonical to the multi-product version). Can someone maybe point us in the right direction on what the issue may be? What can be improved?
Intermediate & Advanced SEO | | globalrose.com0 -
Are my language tags correct?
Hello, I have a Spanish website for Spanish speaking people es.example.com. I also have example.com for all English speaking people across the world. I want that users who go to google.es and search in English get our example.com site and others who search in Spanish on google.es get the Spanish site. Should the tags be like this: Or should we also have this tag aswell to specify? Otherwise we might only show the es.domain even for english queris? :
Intermediate & Advanced SEO | | advertisingtech0 -
Avoiding Duplicate Content with Used Car Listings Database: Robots.txt vs Noindex vs Hash URLs (Help!)
Hi Guys, We have developed a plugin that allows us to display used vehicle listings from a centralized, third-party database. The functionality works similar to autotrader.com or cargurus.com, and there are two primary components: 1. Vehicle Listings Pages: this is the page where the user can use various filters to narrow the vehicle listings to find the vehicle they want.
Intermediate & Advanced SEO | | browndoginteractive
2. Vehicle Details Pages: this is the page where the user actually views the details about said vehicle. It is served up via Ajax, in a dialog box on the Vehicle Listings Pages. Example functionality: http://screencast.com/t/kArKm4tBo The Vehicle Listings pages (#1), we do want indexed and to rank. These pages have additional content besides the vehicle listings themselves, and those results are randomized or sliced/diced in different and unique ways. They're also updated twice per day. We do not want to index #2, the Vehicle Details pages, as these pages appear and disappear all of the time, based on dealer inventory, and don't have much value in the SERPs. Additionally, other sites such as autotrader.com, Yahoo Autos, and others draw from this same database, so we're worried about duplicate content. For instance, entering a snippet of dealer-provided content for one specific listing that Google indexed yielded 8,200+ results: Example Google query. We did not originally think that Google would even be able to index these pages, as they are served up via Ajax. However, it seems we were wrong, as Google has already begun indexing them. Not only is duplicate content an issue, but these pages are not meant for visitors to navigate to directly! If a user were to navigate to the url directly, from the SERPs, they would see a page that isn't styled right. Now we have to determine the right solution to keep these pages out of the index: robots.txt, noindex meta tags, or hash (#) internal links. Robots.txt Advantages: Super easy to implement Conserves crawl budget for large sites Ensures crawler doesn't get stuck. After all, if our website only has 500 pages that we really want indexed and ranked, and vehicle details pages constitute another 1,000,000,000 pages, it doesn't seem to make sense to make Googlebot crawl all of those pages. Robots.txt Disadvantages: Doesn't prevent pages from being indexed, as we've seen, probably because there are internal links to these pages. We could nofollow these internal links, thereby minimizing indexation, but this would lead to each 10-25 noindex internal links on each Vehicle Listings page (will Google think we're pagerank sculpting?) Noindex Advantages: Does prevent vehicle details pages from being indexed Allows ALL pages to be crawled (advantage?) Noindex Disadvantages: Difficult to implement (vehicle details pages are served using ajax, so they have no tag. Solution would have to involve X-Robots-Tag HTTP header and Apache, sending a noindex tag based on querystring variables, similar to this stackoverflow solution. This means the plugin functionality is no longer self-contained, and some hosts may not allow these types of Apache rewrites (as I understand it) Forces (or rather allows) Googlebot to crawl hundreds of thousands of noindex pages. I say "force" because of the crawl budget required. Crawler could get stuck/lost in so many pages, and my not like crawling a site with 1,000,000,000 pages, 99.9% of which are noindexed. Cannot be used in conjunction with robots.txt. After all, crawler never reads noindex meta tag if blocked by robots.txt Hash (#) URL Advantages: By using for links on Vehicle Listing pages to Vehicle Details pages (such as "Contact Seller" buttons), coupled with Javascript, crawler won't be able to follow/crawl these links. Best of both worlds: crawl budget isn't overtaxed by thousands of noindex pages, and internal links used to index robots.txt-disallowed pages are gone. Accomplishes same thing as "nofollowing" these links, but without looking like pagerank sculpting (?) Does not require complex Apache stuff Hash (#) URL Disdvantages: Is Google suspicious of sites with (some) internal links structured like this, since they can't crawl/follow them? Initially, we implemented robots.txt--the "sledgehammer solution." We figured that we'd have a happier crawler this way, as it wouldn't have to crawl zillions of partially duplicate vehicle details pages, and we wanted it to be like these pages didn't even exist. However, Google seems to be indexing many of these pages anyway, probably based on internal links pointing to them. We could nofollow the links pointing to these pages, but we don't want it to look like we're pagerank sculpting or something like that. If we implement noindex on these pages (and doing so is a difficult task itself), then we will be certain these pages aren't indexed. However, to do so we will have to remove the robots.txt disallowal, in order to let the crawler read the noindex tag on these pages. Intuitively, it doesn't make sense to me to make googlebot crawl zillions of vehicle details pages, all of which are noindexed, and it could easily get stuck/lost/etc. It seems like a waste of resources, and in some shadowy way bad for SEO. My developers are pushing for the third solution: using the hash URLs. This works on all hosts and keeps all functionality in the plugin self-contained (unlike noindex), and conserves crawl budget while keeping vehicle details page out of the index (unlike robots.txt). But I don't want Google to slap us 6-12 months from now because it doesn't like links like these (). Any thoughts or advice you guys have would be hugely appreciated, as I've been going in circles, circles, circles on this for a couple of days now. Also, I can provide a test site URL if you'd like to see the functionality in action.0 -
Capitals in URLs
Hello Mozzers. I've just been looking at a site with capitals in the URL - capitals are used in the product descriptions, so you'll have a URL structure like this: www.company.com/directory1/Double-Beds-Luxury (such URLs do not work if I lower the case of the capitals). There are 50,000 such products on the site. Clearly one drawback is potential customers might type in, or link to, the lower case of the URL and get a "not found" result (though the urls are relatively long so not that likely I'm thinking). Are there any additional drawbacks with the use of capitals outlined here?
Intermediate & Advanced SEO | | McTaggart0 -
URL or Domain length
Hi All, I am wondering if google still does give importance to the length of the domain or url. If yes then how much is the acceptable length of a domain and URL. Many Thanks!
Intermediate & Advanced SEO | | HiteshBharucha0 -
Overly-Dynamic URLs & Changing URL Structure w Web Redesign
I have a client that has multiple apartment complexes in different states and metro areas. They get good traffic and pretty good conversions but the site needs a lot of updating, including the architecture, to implement SEO standards. Right now they rank for " <brand_name>apartments" on every place but not " <city_name>apartments".</city_name></brand_name> There current architecture displays their URLs like: http://www.<client_apartments>.com/index.php?mainLevelCurrent=communities&communityID=28&secLevelCurrent=overview</client_apartments> http://www.<client_apartments>.com/index.php?mainLevelCurrent=communities&communityID=28&secLevelCurrent=floorplans&floorPlanID=121</client_apartments> I know it is said to never change the URL structure but what about this site? I see this URL structure being bad for SEO, bad for users, and basically forces us to keep the current architecture. They don't have many links built to their community pages so will creating a new URL structure and doing 301 redirects to the new URLs drastically drop rankings? Is this something that we should bite the bullet on now for future rankings, traffic, and a better architecture?
Intermediate & Advanced SEO | | JaredDetroit0 -
Should we Use rel=canonical in ccTLDs websites
We have multilingual eCommerce websites with some content variations but majority of the content remains the same We have used rel=alternate hreflang on corresponding ccTLDs respective countries. for example on example.com -which is the oldest of these sites- we have used Now should we also use link rel="canonical" href="example.com" on all ccTLDs? What are the advantages and disadvantages of using it?
Intermediate & Advanced SEO | | CyrilWilson0 -
Canonical tag question
Suppose a site has two pages ( Page A ) and Page B. Both of them have pagerank, but duplicate content. The page A is ranked for keyword "seo india" and page B is ranked for keyword "seo services". If i implement canonical tag on page B, does 1. The pagerank of page B will be transfered to Page A ? 2. Does the site A now ranks for keyword "seo servicies " ( for which Page B was ranking earlier )
Intermediate & Advanced SEO | | seoug_20050