Canonical URLs help search engines understand which URL is primary when multiple versions exist, addressing duplicate content issues and improving SEO by consolidating link equity and ranking power. The `rel="canonical"` attribute specifies the preferred version of a webpage.
Canonical URLs help avoid duplicate content issues by specifying the preferred version of a webpage that search engines should index and display, using the `rel="canonical"` attribute to concentrate link equity on one page and improve user experience.
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