Astroturfing is the practice of creating a deceptive appearance of grassroots support for a cause, campaign, or product, often orchestrated by organizations or groups with vested interests. This manipulation involves using fake testimonials, social media accounts, and fabricated narratives to give the illusion that a movement is widespread and popular when it is actually engineered. Understanding astroturfing is crucial in recognizing how media and technology can distort public perception and influence social behavior.