Data notification method and system

摘要

For a group consisting of a plurality of users, data of users who constitute the group is acquired. Thereafter, the users are made to stay in a certain area by determining a user having high importance in the group based on the user data acquired and by providing adequate data to a user having high importance, and then data related to the group is provided. With the arrangement, for a case where a plurality of intended persons are to simultaneously receive data such as advertising and such intended persons form a group, it is possible to effectively notify data in an adequate method.