I have a Google search question. Can the Google search algorithm tell the difference between a social bookmarking site and a link farm. I know that Google search drastically lowers the ranking of sites it interprets as a link farm and I think that social bookmarking site and a link farm have similar characteristics.
I started to think about this question when I set up a Shaarli bookmarking site and wondered how Google search would infer the purpose of the site. I do not want my other content to be ignored because I have a bookmarking site.
It is not obvious to me how Google could tell the difference especially if the source was not a commercial site such as Diigo.