Google indexing Internal Search Results

[Tonyd23]

Greeting,

Currently I have noticed that Google is starting to index our internal search page results.  Should I block those pages in our robot txt file or have you ever heard of any websites that actually gained traffic or rank by letting Google index those pages?

Thanks

[wissamdandan]

Yes you should block these pages.

This is a quote from Matt Cutts concerning this issue

Use robots.txt to prevent crawling of search results pages or other auto-generated pages that don’t add much value for users coming from search engines

Disallow: /search