dissemination of information—facts, arguments, rumours, half-truths, or lies—to influence public opinion. Propaganda is the more or less systematic effort to manipulate other people’s beliefs, attitudes, or actions. (Britannica)
Propaganda can be found in news and journalism, government, advertising, entertainment, education, and activism and is often associated with material which is prepared by governments as part of war efforts, political campaigns, health campaigns, revolutionaries, big businesses, ultra-religious organizations, the media, and certain individuals such as soapboxers.
In the 20th century, the English term propaganda was often associated with a manipulative approach, but historically, propaganda has been a neutral descriptive term of any material that promotes certain opinions or ideologies.
However, do note that some dictionaries include in the definitions of evangelism usages that are not limited to religion. Collins for example gives this definition:
any zealous effort in propagandizing for a cause.
In Propaganda and Persuasion, the authors Garth Jowett and Victoria O'Donnell explain:
Besides being associated with unethical, harmful, and unfair tactics, propaganda is also commonly defined as “organized persuasion”
(DeVito, 1986, p. 239). Persuasion differs from propaganda... but the term is often used as a catch-all for suspicious
rhetoric. Sproule (1994) references propaganda as organized mass persuasion with covert intent and poor or nonexistent reasoning:
Propaganda represents the work of large organizations or groups to win over the public for special interests through a massive orchestration of attractive conclusions packaged to conceal both their persuasive purpose and lack of sound supporting reasons (p. 8).