1. A system for ranking contents of one or more documents, applications, sound or visual media through human assistance provided by one or more search engines based on a search query sent by a user, the system comprising: a processor; a memory accessible by the processor, the system configured; and a client application stored in the memory, which, when executed by the processor, causes the system to be configured to: capture the search query sent by the user; capture one or more keyword tags provided by an author of the one or more documents, applications, sound, or visual media; monitor one or more interactions of the user with the one or more documents, applications, sound or visual media for one or more events; and compute a relevance measure for the one or more documents, applications, sound or visual media based on the search query and the one or more events; or provide a relevance measure to the one or more documents, applications, sound or visual media based on the captured keyword tags provided by the document author and the one or more events.