Final answer:
Activities that intentionally mislead consumers or involve dishonesty on behalf of clients are known as 'Deceptive marketing.' This unethical practice contrasts with ethical marketing, which values honesty and transparency.
Step-by-step explanation:
Activities that deliberately deceive consumers or involve lying on behalf of clients are referred to as Deceptive marketing. Deceptive marketing practices are unethical as they mislead customers, often through false advertising, misleading labels, or false promises about a product or service's performance. Not only do these practices violate consumer trust, but they can also lead to legal consequences for businesses that engage in such behavior. In contrast, ethical marketing practices involve being truthful and transparent, ensuring that all marketing communications are honest and not misleading.