In the book it is described approaches to segmentation in blood service facilities, in particular, segmentation factors and groups of people behind them. There are presented the results of a study conducted among young people in Sumy. It was found out what characteristics young people have, how and where they look for information, which influences decision-making. It was identified the most important parameters and investigate their relationship. It was selected segments by the most important parameters to develop proposals for working with individual segments.