This assignment explores the impact of consumer decision making process on the purchase of laptop in Harvey Norman, Australia. It analyzes the various forces that influence consumer buying behaviors and marketing psychology. The findings show that consumer buying decisions are influenced by factors such as personal behaviors, lifestyles, attitudes, cultural aspects, and online marketing. The key findings suggest that strengthening the relationship between the business and its customers can enhance brand trust and loyalty. Recommendations are provided to influence buying decisions and ensure business success.