Additionally, users may join common-interest user groups organized by workplace, school, hobbies or other topics, and categorize their friends into lists such as "People From Work" or "Close Friends".
Additionally, users can report or block unpleasant people.
" and according to its data, half of the site's membership used Facebook daily, for an average of 34 minutes, while 150 million users accessed the site by mobile.
In late 2007, Facebook had 100,000 business pages (pages which allowed companies to promote themselves and attract customers).
These started as group pages, but a new concept called company pages was planned.
Zuckerberg wrote a program called "Facemash" in 2003 while attending Harvard University as a sophomore (second year student).
According to The Harvard Crimson, the site was comparable to Hot or Not and used "photos compiled from the online facebooks of nine Houses, placing two next to each other at a time and asking users to choose the "hotter" person".
The name comes from the face book directories often given to American university students.