In recent years, the sales promotion techniques provided by marketing strategies has increased and has become an important factor in the fashion industry. In todays society customers have more knowledge and easier access to information online. Due to the growth of consumer awareness, businesses need to gain insight on how limited-time promotion techniques affect consumers.  Accordingly, the purpose is to gain insight and understand how millennials' impulse buying is influenced by limited-time promotion when purchasing fashion products online, and explore if hedonic and utilitarian motivation appear and lead millennials to a purchase decision. The aim is to develop a more recent and essential knowledge within this topic due to the poverty of recent studies on if limited-time promotion influences millennials impulse buying behavior.  The empirical findings that were collected using a multiple-method qualitative study of four focus-groups and six semi-structured interviews with people originated from Sweden. The findings were analyzed and discussed with the literature that have been presented to determine their similarities or differences.  The conclusion of this thesis demonstrates millennials in Sweden's awareness of businesses marketing strategies, and that they are detached to the process. Throughout the thesis, millennials' attitudes towards the businesses promotions in the market is saturated, and that they are not influenced by limited-time promotion online since the knowledge that there will soon occur a discount again. Although the increased awareness of millennials in Sweden, utilitarian and hedonic motivations tend to create impulse-buying behavior online. Furthermore, to attract millennials in Sweden some factors have been identified.