In an interview, Udi Manber (currently vice president in charge of search quality for Google, and previously a senior vice president at Amazon and Yahoo's chief scientist), has said:
Interviewer: What do you think a person expects from a Web search?
Udi Manber: They want to get an answer. Our goal is very simple: We want to return to the user the answer that they need.
So simple and so hard. These words should be on stone. Most business' failures come from ignoring users demands and opinions. Besides, getting to know what the user wants to know is being able to determine their information need, as it is called in Information Retrieval. The very first problem, still unresolved. Fortunately, still in the agenda of the very search engine.