From the Disinformation Overview: "[T]he purpose of disinformation is to mislead. disinformation is information created and distributed with the express purpose of causing harm. [...] A targeted disinformation campaign, in the context of this paper, is more insidious than simply telling lies on the internet. One untrue meme or contrived story may be a single thread in a broader operation seeking to influence a target population through methods that violate democratic values, social norms and, in some jurisdictions, the law. [...] Targeted disinformation campaigns are not a new phenomenon and sophisticated ones follow a predictable progression. after establishing the objective, a threat actor follow distinct steps, discussed later in more detail: recon, build, seed, copy, amplify, and control to bring about an outcome."
Department of Homeland Security Office of Inspector General: https://www.oig.dhs.gov/