1) Word of mouth marketing, or "buzz", refers to person-to-person communication about a brand through verbal discussions, visual media, or online channels. Most buzz occurs through in-person interactions rather than online. 2) Studies show that buzz has a significant influence on consumer purchasing decisions globally. People also place the highest trust in recommendations from other consumers rather than from brands. 3) Major companies actively invest in word of mouth marketing techniques like encouraging user participation, fostering emotional connections, disseminating shareable content, and listening to customer feedback. Measurement of buzz is also increasingly important.