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Glossary · SEO

What is Canonical Tag?

A canonical tag is the signal that tells a search engine which of several URLs with identical or near-identical content is the primary page. In e-commerce it is mandatory because of variant, filter and sort parameters.

Detail

A badly set canonical can drop pages out of the index, so it has to be configured deliberately rather than automatically. Pointing the canonical of paginated pages (page 2, page 3) at the first page is a common mistake — it stops the products on later pages from being indexed.

Example

A URL carrying ?color=blue&sort=price parameters should point its canonical at the clean product URL.
FAQ

Common questions on this topic.

How is Canonical Tag calculated?

A badly set canonical can drop pages out of the index, so it has to be configured deliberately rather than automatically. Pointing the canonical of paginated pages (page 2, page 3) at the first page is a common mistake — it stops the products on later pages from being indexed.

Why does Canonical Tag matter?

A badly set canonical can drop pages out of the index, so it has to be configured deliberately rather than automatically. Pointing the canonical of paginated pages (page 2, page 3) at the first page is a common mistake — it stops the products on later pages from being indexed.

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