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From Citizendium, the Citizens' Compendium

Intelligence, in the context of information gathering, refers to a wide range of techniques for picking and prioritizing the subjects of interest, collecting and validating raw information, and inferring meaning by analyzing (ideally) multiple sources of information on a given subject. Once the analytical results are available, they must be disseminated to the people that need it.

In a military, law enforcement, business, and national intelligence process, some of the means of collection, and possibly analysis, may be secret, for if the opponent knew the methods were in use, that person or organization could take precautions against them. Therefore, there is a delicate balance between the number of people that receive the analyzed material, and the risk of revealing "sources and methods". The discipline of counterintelligence focuses on protecting one's own sensitive information, not just one's intelligence processes, from an opponent.