Google, duplicate content caused by URL parameters, and you

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- [How can URL parameters, like session IDs or tracking IDs, cause duplicate content?](https://developers.google.com/search/blog/2007/09/google-duplicate-content-caused-by-url?hl=fr#how-can-url-parameters,-like-session-ids-or-tracking-ids,-cause-duplicate-content)

- [Why should you care?](https://developers.google.com/search/blog/2007/09/google-duplicate-content-caused-by-url?hl=fr#why-should-you-care)

- [How we help users and webmasters with duplicate content](https://developers.google.com/search/blog/2007/09/google-duplicate-content-caused-by-url?hl=fr#how-we-help-users-and-webmasters-with-duplicate-content)

- [If you find you have duplicate content as mentioned above, can you help search engines understand your site?](https://developers.google.com/search/blog/2007/09/google-duplicate-content-caused-by-url?hl=fr#if-you-find-you-have-duplicate-content-as-mentioned-above,-can-you-help-search-engines-understand-your-site)

- [How can you design your site to reduce duplicate content?](https://developers.google.com/search/blog/2007/09/google-duplicate-content-caused-by-url?hl=fr#how-can-you-design-your-site-to-reduce-duplicate-content)

- [How can we better assist you in the future?](https://developers.google.com/search/blog/2007/09/google-duplicate-content-caused-by-url?hl=fr#how-can-we-better-assist-you-in-the-future)

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Ce contenu vous a-t-il été utile ?

Ce contenu vous a-t-il été utile ?