This page has no link rel="canonical". A canonical tag names the preferred URL for a piece of content, which matters whenever the same page is reachable by more than one address: with and without a trailing slash, with tracking parameters, over http and https, or through several category paths. Without it, search engines choose for you, and they do not always choose the URL you would.
The page's head contains no canonical link, so every URL that serves this content competes with the others.
Add a self-referencing canonical with the full, absolute URL of the preferred version:
<link rel="canonical" href="https://example.com/guides/running-shoes">
A canonical consolidates the ranking signals earned by every variant of a URL onto one address, instead of splitting them across duplicates that compete with each other.
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.
bseoa automatically checks for this warning during site analysis, along with hundreds of other technical SEO issues.
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