Quackery refers to the promotion of unproven or fraudulent medical practices and treatments. It often involves individuals or companies making exaggerated claims about the effectiveness of their products or services, which can lead to harm or financial loss for consumers. Common examples include dubious dietary supplements, miracle cures, and alternative therapies that lack scientific backing. The term is often associated with pseudoscience, where practitioners may use misleading information to convince people of their legitimacy. Quackery can undermine public trust in legitimate healthcare and may divert individuals from seeking effective medical treatment for serious conditions.