System and method for providing advertisement data with conversation data to users

摘要

A communication system according to this invention is constituted such that a server apparatus for processing mutual conversation data of a plurality of users and client apparatuses of the respective users are connected to each other. The server apparatus includes a chat processing section or a message processing section which can output advertisement data for performing advertisement to the users to the users through the information terminal apparatuses together with conversation data, and a communication processing control interface for transmitting the advertisement data and the conversation data to the client apparatuses.