The concept of Free Walking Tour in the tourism branch can be compared with a freeware on the IT-market. Free software can be an advertising of the commercial product or its manufacturer. The organizers of the Free Walking Tour often provide some business services such as a shuttle service, different entertainment, thematic, motorized and individual tours. Free Walking Tour guides can be compared with the street performers who entertain passers-by and offer for donations as well as compared to history professors who bring a city and it's stories to life. Because tour guides only work for gratuities, the quality of a free tour tends to be significantly and consistently better than traditional "pay first" tours, which can take advantage of unknowing travelers.