Hơn 1/5 dân số thế giới tham gia mạng xã hội
Ước tính có khoảng 1,61 tỷ người, tương đương 22% dân số toàn cầu, đăng nhập vào các trang mạng xã hội ít nhất một lần mỗi tháng trong năm 2013.
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