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Canonical URL

Verifies the implementation of canonical tags to prevent duplicate content.

What is this check?

A canonical tag (`<link rel='canonical'>`) is a piece of HTML code that tells search engines which version of a URL is the 'master' or preferred version when multiple URLs have the same or very similar content.

Why is it important?

It's the standard way to solve duplicate content issues. It consolidates your SEO signals (like links) into a single URL, preventing them from being split across multiple pages.

What is the impact?

Without canonical tags, search engines might get confused, index the wrong page, or split your ranking authority among duplicate versions.

Example Implementation

<head>
  <link rel="canonical" href="https://www.yourdomain.com/preferred-page-url" />
</head>