Your page has a canonical tag, but the URL is empty. A canonical tag is used to tell search engines which version of a page is the 'main' one to avoid duplicate content issues. An empty canonical tag is invalid and will be ignored by search engines, leaving you vulnerable to those issues.
<link rel="canonical" href="">Provide the full, absolute URL of the preferred version of the page in the `href` attribute.
<link rel="canonical" href="https://example.com/my-preferred-page">A correct canonical URL consolidates all SEO signals (like links) to a single, authoritative URL, which strengthens its ability to rank and prevents duplicate content penalties.
This issue can affect your site's search engine rankings and user experience. Addressing it promptly helps ensure optimal performance and visibility in search results.
Black SEO Analyzer automatically checks for this warning during site analysis, along with hundreds of other technical SEO issues.
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