Share function is a powerful tool that allows you to distribute information. Each repost will see at least a quarter of the reposters' friends (given that half of his friends visit Facebook rarely, and another quarter reads the news "diagonally").When a user shares someone's message on the network, it is understood that he has read and missed what he has written through himself. And if a repot is not worth the remark, then the user is in solidarity with the author. Therefore, sometimes the news is even more valuable than the original, and it affects more strongly. This is due to the psychological characteristics of a person's perception of information from close or unfamiliar sources.
Shares on Facebook is one of the most effective ways to spread the news among a reading and interested audience. Its advantage is the involvement of target users.