Canonical URL

Canonical URL

A canonical URL is an HTML defined link element that helps websites avoid possible duplicate content penalties from search engines by defining the canonical, or preferred, version of a web page as part of SEO best practice. A common example where a canonical URL must be defined is on an eCommerce site that will have a single product with multiple versions (such as size, color, etc.) that cause the exact same product copy to appear on multiple unique URLS.