Social Search is a type of web search that takes into account the social network of the person searching. Results produced by a social search engine gives more visibility to content created or touched by users in the person's social network. Facebook, with its robust social graph, is uniquely positioned to provide users with the best social search results.
1) Under what circumstances are social search results most relevant to a mobile user?
2) What is a mobile application that could be built that leverages social search for that specific situation?