By default, everything on your Ning Network that visitors can see when they’re signed out can be indexed by search engines like Google, and will show up in search results. If you’d like to remove certain pages of your Ning Network from search results, you can prevent search engines from indexing those pages by editing your robots.txt file. Keep in mind that it may take a bit of time for search engines to reindex after you make changes.
You can edit your robots.txt file by heading to the Robots.txt page in the Social Site Manager. Here’s how it will look by default:
While you can edit the robots.txt file directly from this page, the easiest way to proceed is to generate a new robots.txt file with a service like Google Webmaster Tools and copy and paste it into this window. When you’ve finished making edits, be sure to click the “Save” button at the bottom of the page.