Facebook is a social network service and website launched in February 2004 that is operated and privately owned by Facebook, Inc. As of July 2010 Facebook has more than 500 million active users, which is about one person for every fourteen in the world.Users may create a personal profile, add other users as friends and exchange messages, including automatic notifications when they update their profile. Additionally, users may join common interest user groups, organized by workplace, school, or college, or other characteristics. The name of the service stems from the colloquial name of books given to students at the start of the academic year by university administrations in the US with the intention of helping students to get to know each other better. Facebook allows anyone who declares to be at least 13 years old to become a registered user of the website.
Facebook was founded by Mark Zuckerberg with his college roommates and fellow computer science students Eduardo Saverin, Dustin Moskovitz and Chris Hughes.The website's membership was initially limited by the founders to Harvard students, but was expanded to other colleges in the Boston area, the Ivy League, and Stanford University. It gradually added support for students at various other universities before opening to high school students, and, finally, to anyone aged 13 and over.
Facebook has met with some controversy. It has been blocked intermittently in several countries including Pakistan, Syria, the People's Republic of China, Vietnam, Iran, and North Korea. It has also been banned at many places of work to discourage employees from wasting time using the service. Facebook's privacy has also been an issue, and the safety of their users has been compromised several times. Facebook settled a lawsuit regarding claims over source code and intellectual property.
A January 2009 Compete.com study ranked Facebook as the most used social network by worldwide monthly active users, followed by MySpace. Entertainment Weekly put it on its end-of-the-decade 'best-of' list, saying, "How on earth did we stalk our exes, remember our co-workers' birthdays, bug our friends, and play a rousing game of Scrabulous before Facebook?
Traffic to Facebook has increased exponentially since 2009. More people visited Facebook than Google for the week ending March 13, 2010. Facebook has also become the top social network across eight individual markets in the region, Philippines, Australia, Indonesia, Malaysia, Singapore, New Zealand, Hong Kong and Vietnam, while other brands commanded the top positions in certain markets, including Google-owned Orkut in India, Mixi.jp in Japan, CyWorld in South Korea and Yahoo!’s Wretch.cc in Taiwan.
Most of Facebook's revenues comes from advertising. Microsoft is Facebook's exclusive partner for serving banner advertising, and as such Facebook only serves advertisements that exist in Microsoft's advertisement inventory. According to comScore, an internet marketing research company, Facebook collects as much data from its visitors as Google and Microsoft, but considerably less than Yahoo!. In 2010, the security team began expanding its efforts to counter threats and terrorism from users. On November 6, 2007, Facebook launched Facebook Beacon, which was an ultimately failed attempt to advertise to friends of users using the knowledge of what purchases friends made.
Facebook generally has a lower clickthrough rate (CTR) for advertisements than most major websites. For banner advertisements, they have generally received one-fifth the number of clicks on Facebook compared to the Web as a whole. This means that a smaller percentage of Facebook's users click on advertisements than many other large websites. For example, while Google users click on the first advertisement for search results an average of 8% of the time (80,000 clicks for every one million searches), Facebook's users click on advertisements an average of 0.04% of the time (400 clicks for every one million pages).
Sarah Smith, who was Facebook's Online Sales Operations Manager, confirmed that successful advertising campaigns can have clickthrough rates as low as 0.05% to 0.04%, and that CTR for ads tend to fall within two weeks. Competing social network MySpace's CTR, in comparison, is about 0.1%, 2.5 times better than Facebook's but still low compared to many other websites. Explanations for Facebook's low CTR include the fact that Facebook's users are more technologically savvy and therefore use ad blocking software to hide advertisements, the users are younger and therefore are better at ignoring advertising messages, and that on MySpace, users spend more time browsing through content while on Facebook, users spend their time communicating with friends and therefore have their attention diverted away from advertisements.
On Pages for brands and products, however, some companies have reported CTR as high as 6.49% for Wall posts. Involver, a social marketing platform, announced in July 2008 that it managed to attain a CTR of 0.7% on Facebook (over 10 times the typical CTR for Facebook ad campaigns) for its first client, Serena Software, managing to convert 1.1 million views into 8000 visitors to their website. A study found that for video advertisements on Facebook, over 40% of users who viewed the videos viewed the entire video, while the industry average was 25% for in-banner video ads.
Users can create profiles with photos, lists of personal interests, contact information and other personal information. Communicating with friends and other users can be done through private or public messages or a chat feature. Users can also create and join interest groups and "like pages" (formerly called "fan pages" until April 19, 2010), some of which are maintained by organizations as a means of advertising.
