From Wikipedia
A term originated by the US military.[citation needed, The US Department of Defense (DOD) gives this definition:
Actions to convey and/or deny selected information and
indicators to foreign audiences to influence their emotions, motives, and objective reasoning as well as to intelligence systems and leaders at all levels to influence official estimates, ultimately resulting in foreign behaviors and official actions favorable to the
originator's objectives. In various ways, perception management ocombines truth projection,[1] operations security, cover and o deception, and psychological operations.