Word-of-Mouth Advertising is a marketing strategy where customers share their experiences and opinions about a product or service with others. This form of advertising relies on personal recommendations rather than traditional media, making it more trustworthy for potential buyers. When people hear positive feedback from friends or family, they are more likely to consider purchasing the product. This type of advertising can occur naturally or be encouraged by businesses through incentives, such as referral programs. Social Media has amplified the impact of word-of-mouth, allowing information to spread quickly and reach a larger audience. Overall, it plays a crucial role in shaping consumer behavior.