Social can exchange information with each other.A data warehouse knowledge, because we can offer and comment. Knowledge exchange cost in communicating with others.A media presentation itself, such as writing, pictures, videos, for others to watch and comment.Use the media in advertising. Public relations work and income to help create a user's employment new. The stress for users who want to find friends fun relationship from friends to friends, but at the same time, it has many disadvantages that may impact from social
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