The increased use of tailored marketing has contributed to companies being able to reach customers to a greater extent in a more individualized way. To be able to tailor their marketing, companies need to collect large amounts of personal information from their consumers, which has been criticized. The criticism regarding companies collecting consumer’s personal information has led to questions as to whether this is something that may violate an individual's integrity. The purpose of this thesis has been to study different generations' knowledge regarding the collection of data through cookies and whether this is something that affects consumer behavior. Hopefully this study will contribute with useful knowledge for professional marketers in order to optimize marketing strategies towards the different generations and thus ensuring they do not violate the integrity of the different generations. The study was conducted using semi-structured interviews, where five people from four different generations were interviewed. The results show differences between the generations both in terms of the perceived intrusion of their privacy as well as influenced buying behavior related to tailored marketing.