How to avoid the content penalty for duplicates?

     1. Avoiding duplication of content

2. Changing the canonical URL for duplicate content.
3. Emblazoning the duplicate page with a canonical link component.
4. Including an HTML connection between the duplicate page and the main page.

You can take some measures to prevent duplicate content problems and make sure that visitors see the stuff you want them to. Use 301s: If you've changed the structure of your website, you should use 301 redirects ("RedirectPermanent") in your. htaccess file to intelligently reroute visitors, Googlebot, and other spiders