In the early days of social network services, offline personal relationships were transferred to the virtual environment of the Internet, and they were closed and mainly focused on expanding relationships between people, such as making friends and messengers.
초창기의 소셜 네트워크 서비스는 오프라인의 인맥 관계를 인터넷의 가상 환경으로 옮겨놓은 형태로, 친구 맺기, 메신저 등 폐쇄적이고 주로 사람간의 관계 확장에 치중하였다.