This report examines innovation theories, focusing on the diffusion of innovation, and their practical application in the context of product development. The report begins by defining innovation and its importance, particularly within the context of an organization. It then delves into the diffusion of innovation theory, detailing its origins, key concepts such as adaptation, and the characteristics of different adopter categories (innovators, early adopters, early majority, late majority, and laggards). The report also discusses factors influencing the adaptation process, including relative advantage, compatibility, complexity, triability, and observability. Furthermore, the report applies these theories to the historical development of TransferTravel.com, an online travel marketplace, illustrating how innovation has shaped its services and customer offerings. It concludes by discussing the limitations of the theory and the importance of adapting strategies to remain competitive in the market. The report also highlights the significance of innovation in the travel industry, specifically in providing last-minute deals and accommodation services. The report also considers the five-stage decision making process that includes awareness, interest, evaluation, trial, and adoption.