Canonical tag definition and duplicate url management
Canonical identifies a preferred address for pages with the same or very similar content. An HTML link with rel="canonical" tells a search system which version the site owner considers primary.
The preferred absolute URL is declared in the head section
It helps align signals for duplicate addresses
It works alongside consistent internal links and sitemap entries
It is a signal to the search system, which may select a different version
Duplicate and URL consistency checks can form part of an SEO audit
Purpose and crawler guidance
When the same material is available at several addresses, canonical helps express a preference for the primary URL. Links, sitemaps and other signals should be consistent. Pages with different content should not automatically be declared copies.
Hypothetical example
Suppose the same product is accessible at /catalog/item and /catalog/item?ref=banner. The second address declares https://example.az/catalog/item as its canonical URL. This expresses a preference for the clean address for the same material while leaving the parameterised link accessible.
Frequently asked questions
Does a canonical tag work like an HTTP 301 redirect?
No, a canonical tag does not redirect the browser or human visitors. The alternative URL remains fully accessible to users, while signaling to search crawlers which version to index.
What would you like to make?
A short description and a way to reach you are enough to start.
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