Pollchain, launched in February 2021, is a knowledge sharing SNS that allows user to ask and answer various types of information and concerns such as daily life, love affair, social issues, business, and investment through a method called "polling." There are people in this picture Pollchain introduced a protocol economic model in which service users could propose and participate in polling. The Pollchain team creates and consumes content by polling. The economic value of big data accumulated in Pollchain is created by users. There are people in this picture A combination of polling and advertisement is provided by Pollchain. The user receives POLL as a reward when they consume an advertisement. Increased transparency in advertisement execution is provided by the data collected through user participation. More users create and consume polling content increases the exposure of advertisements. There are people in this picture The Greece stage was announced in May of 2021.