It is estimated that over 900 million people are registered users of Facebook, the world's largest social networking site.
A na-eme atụmatụ na ihe karịrị nde mmadụ 900 bụ ndị e debara aha ha na Facebook , ebe nrụọrụ weebụ ịkparịta ụka n'Ịntanet kasị ukwuu.