SEO is a moving target. For blackhat SEOs, it's a constant back and forth cat-and-mouse game between them and Google. And the potential penalties by Google against sites employing blackhat tactics should be enough to encourage you as a site owner to focus your efforts on whitehat SEO. Drupal has a lot of tools which can help site builders format their content to be easily understood and categorized by search engines. And one of those factors which Google uses is the page's URL.
So it's important to pay attention to a few things related to URLs in your Drupal config.
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