How do I exclude a Help Center page from being indexed by Google?
To temporarily exclude a specific page from being indexed by Google, utilize the Remove URLs feature available in your Google Webmasters Tool account. This feature indicates which page should be removed from the Search Engine Results Pages by Google.
Verify your account with Google Webmasters Tool by adding a meta tag to the Header of the Help Center, as described here. If you wish, you can restrict Google from indexing all the content of your Help Center, by following the steps described in this article: How can I restrict Google from indexing my Help Center?