Buying behaviour model explains the systematic process through which consumers make their purchasing decisions, influenced by psychological, social, cultural, and personal factors. It serves as a framework for understanding how needs are recognized, how information is searched and evaluated, and finally how purchase and post-purchase decisions are made. In the field of Buying and Merchandising, this model is crucial as it helps merchandisers predict consumer preferences, design effective strategies, and ensure product availability that aligns with consumer demand. The model generally begins with problem recognition, where a consumer identifies a gap between their current state and desired state. For example, realizing the need for a new outfit before a festival triggers the buying process. The second stage is information search, where the consumer seeks internal or external information to fulfill the need. Internal sources include memory of past purchases or personal experiences, while external sources may involve advertisements, peer suggestions, or store displays. In merchandising, product placement, visual merchandising, and promotions play a vital role in guiding this stage. The next stage is evaluation of alternatives. Consumers compare products across attributes such