The canonical link element has been introduced by Google to distinguish the “original” page from derivative pages within your site carrying the same content. It can happen that the same content on your site is available on various URLs. To avoid confusing Google (and the user), you can tell search engines which URL contains the original content.
For instance, a product of your online shop can belong to three different categories. As the categories are reflected in the URL, it can be reached through different three URLs. This is a problem because you only want one of these URLs to rank in Google’s search results, since the content on those three URLs is the same. You don’t want to confuse visitors about which URL to select. And you don’t want to confuse Google about which URL to display. By setting a canonical you can choose which URL should be shown in the search results.
Nowadays, canonicals are used on every page of your website. For example, you wouldn’t want your indexed URLs containing campaign tags, such as the utm_campaign tag. You want Google to display the ‘clean’ URLs. Therefore, WordPress sets up a canonical for single posts and pages. But WordPress doesn’t do this for any other type of URL on your website. Here’s where the free Yoast SEO plugin comes in: it adds a canonical to your homepage, category archives, tag archives, date archives and author archives.
Yoast SEO Premium
The Yoast SEO Premium plugin adds some features to the Yoast SEO plugin and gives you access to premium support. It includes:
The answer to this question is easy! A canonical will be set by default, so it won’t involve any extra work at all! It’s what we call one of the ‘hidden features’ of the Yoast SEO plugin:
Manually change the canonical
If you want to, it’s possible to change the canonical on a page by page basis. You can do this in the meta box beneath a post or page. There, you’ll find a box to set the canonical URL. This box is empty and only needs to be filled in if you would like to change the default setting. So, don’t worry if it’s empty, because a canonical which points to the proper URL is set for every page!
You might want to change the canonical, for instance, if you post an article on your website that was previously published on a different website. By pointing the canonical to original URL you’ll make sure that this other website shows up in Google (as they are the original owners of the content). But at the same time this gives your readers the opportunity to read this specific article on your website.
In the security tab of the general settings of the Yoast SEO plugin, you can choose whether you want to give ‘authors’ and ‘editors’ control over the advanced part of the SEO meta box. And thus allowing them to set a canonical link for a specific post or page.
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