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I have recently added my website to Google, and I don't understand why he adds useless parameters to my URLs.

Normal URL:


Google URL:


That's boring because the parameter role take the value adc instead of mid.

How can I do to avoid this?

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Google doesn't add parameter to URL alone. Googlebot follows links and display URL it finds.

Search on your webpages and links from other websites. Then, correct these links if you don't want Google displays them.

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All urls are correct on the website. Look at google.com/… – gaetanm Jul 14 '13 at 19:21
Maybe you have backlinks with incorrect parameters. Look at your JavaScript code also. Remember Googlebot saves links it finds. – Zistoloen Jul 14 '13 at 19:32
Checked all links, also in js scripts. No way. :( – gaetanm Jul 14 '13 at 19:58
Did you check links from external websites? – Zistoloen Jul 14 '13 at 20:04
I think I have found the solution: Google Webmaster Tools -> URL Parameters -> edit -> No URLs. – gaetanm Jul 14 '13 at 21:36
up vote 0 down vote accepted

In addition to change the option on Google Webmaster Tool (URL Parameters -> edit -> No URLs), don't forget to use the canonical tag to help Google to erase the bad pages indexed.

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