Google’s choice of canonical pages and how to address duplicate content are two of your primary concerns regarding canonical URLs.
When discussing SEO, the term “canonical tag” is frequently mentioned, and working with cross-functional teams like engineering, analytics, etc. It might seem like it could be more comforting if you’re new to SEO.
In addition to walking through the finer points of what canonical tags are, why they’re significant, what they look like in the wild, where they should be located, and other technical points, we will discuss why they are such great news.
What Is A Canonical?
Before we get into the details of canonical tags, remember this one key fact: Canonical tags are not the same as the Robots.txt file. In other words, Google considers canonical tags to be a strong indication, but it considers a variety of signals to determine whether to honor them or not.
We must first get through the golden rule to move on to the main topic.
The canonical tag is the HTML tag on a web page, but ‘canonical’ is slightly different. In 2009, the canonical tag appeared in the source code of a web page as an HTML tag to inform search engines which URL they should index. You can use this to tell Google which page variations it should index for users.
There are two ways to define canonical variations: a user-declared canonical or a Google-declared canonical.
- User-declared canonical: Exactly what it states, the canonical tag specifies the canonical.
- Google-declared canonical: Google honors this URL as the canonical one.
The URL Inspection Tool in Google Search Console can tell whether a URL has the correct canonicalization. If everything functions correctly, the URLs will match, but we’ll discuss what to do if they don’t exist in the next section.
How Google Determines A Canonical URL
Google reviews the primary content on a site when it crawls and indexes it. (It’s worth noting that content is not exclusively written content).
Google may choose the page it feels best represents the page’s content, using a canonical tag, as we have discussed. A canonical tag is not a directive, so besides it, Google considers other signals – so be consistent. In this crawl, we are likely to find similar pages, and Google will then choose the page it feels is the best representation of what the page is trying to convey to users and select it as canonical.
Google considers canonical tags as one of several extra factors besides internal and external links.
When you use query parameters such as /?some_parameter=xyz to link your pages internally, Google is very likely to ignore your canonical meta tag and choose a URL with a query parameter as canonical. Google crawls RSSs aggressively, so ensure that the canonical URLs you declare match the URLs in your RSS feed.
Google might choose a canonical with the query string e /?source=feed even though it is a tracking parameter if you include URLs to your RSS feed with parameters like /?source=feed. Google is aware of this.
Using a link-shortening service for your RSS feed URLs to track clicks or an RSS service like FeedPress is okay. Google will also make decisions based on user experience.
Google may serve the mobile version of your desktop site to a user on a mobile device if you have one.
The Advantages of Canonical Tags for SEO
Sites with many pages must have canonical tags. They serve several purposes.
You can select the canonical tag – By using the canonical tag, you can tell Google which version of a webpage on your website you believe is the best one to show to users.
Canonicals are Google’s primary source – Google uses the canonical to determine a page’s content and quality. The canonical is crawled more frequently than non-canonical pages.
Duplicate Content
On the surface, it may seem like duplicating content is an easy topic. Still, it is more complex than its name suggests, and it is often negatively associated with it. So before you declare, “I don’t have any duplicate pages,” please read the Google Search Central Documentation definition of “duplicate.”
Sites with duplicate content can be defined as content that is identical across the same language. For example, you might use different pages to support mobile content (such as m., amp, etc.) and dynamic URLs that include parameters or session IDs. You should be fine with your blog having multiple folders, you have an HTTP and HTTPS version of your site, and your site has duplicate content. Canonical importance is vital because it is nothing to panic about and is quite common.
Canonicals May Help With Crawl Budget
“Crawl budget” has probably been mentioned a lot if you have a large site. Canonicals can help ease the burden of your crawl budget, as Google will crawl the canonical versions of pages much more frequently than the non-canonical version. If done correctly, canonicals can help you save on your crawl budget.
No-index tags, redirects, or a robot’s directive are not replacements for this.
Consolidate Link Signs –
A canonical URL directs search engines to consolidate their information for multiple similar pages into a single URL, thereby increasing its value.
Content Syndication –
It’s essential to ensure that the version of your site published externally or used by partners appears in the search results.
Implementing A Canonical Tag
In light of our discussion about the purpose and function of canonical tags, let’s look at how we can utilize them on our websites. It’s usually a good idea to have canonical self-referencing on pages that include metric tracking, HTTPS versions, mobile experiences, and so on because they’re the optimal page version.
You must work with your development/engineering partners if you need help editing the HTML directly. A canonical tag is a line of code that you add to any page’s head> section.
Canonical Tag FAQs
Q: Canonical across domains?
A: You most certainly can. For example, if you publish the same article on multiple sites, a canonical tag will channel all the power to the version you chose as canonical. This is also a good practice when working with third-party websites to ensure syndicated content adheres to standards.
Q: Is a Canonical tag able to pass link equity?
A: Canonicals exist but should not be confused with 301 redirects.
Q: Is it better to use a Canonical tag or a No-Index tag?
A: A no-index tag is a directive, not a canonical tag, that tells search engines to remove a page from their indexes. A canonical tag is a great option to combine all the links and relative signals on a single URL. The answer to this query in the SEO world is ‘it depends.’ When John Mueller talks about the benefits and drawbacks of canonical and noindex tags, he goes into a bit more detail on the questions you should ask yourself when choosing one over the other or both.
Q: Is it better to use a 301 redirect or a canonical tag?
A: There are several things to think about when deciding whether to use a 301 redirect or a no-index tag, but there is one thing you should avoid if possible. If you have two nearly identical web pages and do not want both active, use a 301 redirect. For example, you may use a 301 redirect on a product page that has been permanently out of stock or on a page that you cannot update any longer. You may learn more about 301 vs. canonical tags in this article.
Q: What if Google fails to honor the chosen canonical?
A: Google Search Console’s URL Inspection tool can alert you if Google does not honor the canonical you have selected, as described above. There are many reasons why Google would not honor the user-selected canonical, and you can discover that information using the tool. The canonical tag might need to be correctly implemented, site signals might contradict the canonical, or there might be other reasons. You will likely have to do some research to determine the root cause.
In Conclusion
Having read through this guide, you should now better grasp how to properly utilize canonical tags. Please check your tags and see if there are any areas where improvements can be made to help the search engines notice the information you want.
Read Next: Ways To Improve The Quality Of Content For People & Search Engines
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