What is a canonical tag? When are Canonical URLs necessary? – DMT

A canonical tag works like conveying search engines that a particular URL relates the copy of a page. While using the canonical tag avoid problems caused by identical or “duplicate” content appearing on multiple URLs. Simply, we say the canonical tag tells search engines which version of a URL you want to appear in search results.

Code looks like this:

<link rel=”canonical” href=”http://www.digitalmarketingtrend.info/” />

The problem with URLs

Might be some people think like “Why would anyone duplicate a page?” and negatively they decide that canonicalization isn’t something you have to worry about. Here is the problem is that we, as humans, tend to think of a page as a concept, such as your homepage. For search engines, though, every unique URL is a separate page.

I will show you one example, how search crawlers might be able to reach your homepage in all of the following ways:

  • http://www.example.com
  • https://www.example.com
  • http://example.com
  • http://example.com/index.php
  • http://example.com/index.php?r…

Coming to human perception, all of these URLs represent a single page. To a search crawler, though, every single page of these URLs is a unique “page.” Even in this limited example, we can see there are five copies of the homepage in play.

When are Canonical URLs necessary?

URLs that Identify Variations of the Same Product
Especially it helps more on e-commerce platforms, it’s quite a common thing for URLs to adjust depending upon the specifics of the product that a customer is looking at. For example, let’s say you’re selling t-shirts, and have a separate size and has color options as well. The main page for that product may be www.example.com/product, but you likely also have pages URLs like www.example.com/product?color=blue&size=large.

Setting the Canonical URL for Your Page

we have so many different ways of setting Canonical URLs for your pages, there are a few different approaches you can take. Each way/approach has its own benefits and disadvantages, and some may make more sense for you than others depending upon your overall web strategy. That being said, there isn’t one method that’s uniformly “better” or more SEO-friendly than the others. When it comes down to it, each method has its own situation where it’ll be most appropriate, and the bottom line is that across the board it’s better to have a canonical URL set than to not.

If you don’t know how to write canonical URL code, I will suggest you use this tool:


The first step look into the below image

Firstly, paste your URL as shown above image then click submit button

The second step look into the below image

Then clicking submit button you will get code, Copy code, Paste it on your source code head section

301 Redirects

A 301 redirect helps to redirect that forwards one URL to another URL. For example, you may type “xyz.com” into your browser and automatically be redirected to “www.xyz.com.” 301 redirects tell Googlebot and other search engine crawlers that the URL to which a page gets forwarded needs to be considered the canonical variation.

This is the best way only when you’re deprecating one version of a page for another or when you’re forwarding the root domain to a subdomain. Using it in other situations (like e-commerce sites) can create problems for the clarity of your sitemap, and can also cause issues if you decide to reuse a URL for different content.

Canonicalization is Key

Inserting the canonical URL for your pages is a great way to ensure that search engines and visitors alike understand where your content is coming from, and that your website is performing as well as possible in search rankings.

Note: If you’re using Yoast SEO plugin for your WordPress site you no need to enter this canonical URL code, Yoast SEO plugin will care about it.


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