Canonicalization is the overall process of selecting and signaling the single, preferred version of a webpage when multiple URLs contain identical or very similar content, most commonly implemented through canonical tags.
Beyond canonical tags, canonicalization can also be reinforced through 301 redirects, consistent internal linking, and proper handling of URL parameters, all working together to clearly signal a search engine’s preferred version.
Poor canonicalization is one of the most common sources of duplicate content issues and diluted ranking signals, particularly on larger sites with complex URL structures or e-commerce filtering.
Canonicalization strategy is a core part of our Technical SEO service.