8/8 HTML tags SEO - The Canonical link tag - tells search engines that it is the page you think is the main page
The rel="canonical" link tag is a version of a page that tells search engines that it is the page you think is the main page and hopes to be indexed by search engines and found by people.
Canonical tags allow you to avoid the risk of duplicate content:
The same page is usually used in situations where the same page can be accessed under multiple different URLs, or multiple different pages have very similar content covering the same topic.
Internal duplicate content is not as strict as copy content because there is usually no manipulation intention behind it.
However, this may confuse search engines: unless you specify which URL ranking to use, the search engine may choose for you.
The point is that any given page can have multiple addresses, and there is no fault of your own. Sometimes, they are produced by various artifacts (such as http/https and various tracking tags), and sometimes, they are produced by various sorting and customization options available in the product catalog.
The selected URLs are crawled more frequently, while other URLs are left behind.
You will see that although there is almost no risk of fines, this situation is far from optimal.
Another benefit is that normalized pages make it easier to track performance statistics associated with the content.
Using rel = canonical for duplicate content can help Google integrate all your work and pass link signals from all page versions to the preferred version.
That is where the use of canonical tags can help you steer your SEO work in one direction.
Best SEO practices
Pages with similar content on the same topic.
There are duplicate pages under multiple URLs.
A version of the same page with a session ID or other URL parameters that do not affect the content.
Carefully use canonical tags for almost duplicate pages: If the content of the two pages connected by canonical tags is too different, search engines will simply ignore the tag.
Note: Sometimes although you specify a specific page through the canonical tag, if the user's visit behavior is mainly mentioned on other pages, the search engine will automatically block the canonical page you choose. After being connected to Google Console, Google Console can display relevant data of the website.
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