Disinformation is deliberately misleading information announced publicly or leaked by a government or corporation or other entity for the purpose of influencing opinions or perceptions.
Misinformation is information that is not true. The difference is intent.
Propaganda is a specific type of information aimed at serving an agenda. Even if the message conveys true information, it may be partisan or fail to paint a complete picture. Propaganda attempts to change people’s understanding through deception and confusion rather than persuasion and understanding. Advertising, public relations and (cynically perhaps) all political speech can be said to be propaganda.
All are noise.
Anymore, can we distinguish between political and corporate propaganda?