Facebook went live on February 4, 2004 in Mark Zuckerberg's Harvard University dorm room and was initially called "The Facebook." Ten years later, the social network has more than 1.23 billion users who use the service on the Web or mobile each month.
Facebook's first ads started running in 2004. The one pictured here was likely a "flyer," which Facebook sold to small businesses for $10 to $40 a day, according to Facebook's first ad salesman, Kevin Colleran.
On September 5, 2006, Facebook rolled out News Feed and Mini-Feed to its audience. It was a big and controversial addition to the then profile-centric social network. The Mini-Feed section on each member's profile showed what content he or she had recently added and recent activity elsewhere on the network.
In 2007, Facebook once again simplified its profile design, this time switching up its navigation to include its core features at the top, applications on the left-hand side, and settings in the right-hand corner. With the rollout, the company also introduced "Inbox" as a redesign of its former "My Messages" and "My Shares" pages.
In July of 2008, Facebook invited its members to try out the "new Facebook," which came with tabs and something called "The Wall." Like Mini-Feed, your Wall surfaced updates related to you. The Wall also came with "Publisher" atop the tab for posting photos, notes, and statuses to your Wall.
On March 16, 2009, Facebook made the controversial decision to let people, for the first time, post their content beyond their circle of friends. The company added a privacy option called "Everyone," which meant that members could designate the type of content that was viewable to anyone.
In September 2009, Facebook surpassed 300 million users.
A new year gave birth to an updated profile design in 2010 with a restructured navigation, again in the name of simplicity. The notifications menu, still around in similar form today, made its debut in February atop the page alongside the Facebook logo.
Before the end of July 2010, Facebook would hit half a billion users.
Facebook Timeline debuted in 2011 as the social network's fresh twist on profiles. It was organized like, as the name dictates, a visual timeline and was designed to help members tell their own stories, dating back to their birth. The two-column layout wasn't universally loved, but the company pushed forward with a widespread release by the end of the year.
Ticker arrived alongside Timeline and a News Feed redesign in September 2011. Ticker took over the right-hand column and included a comprehensive stream of your friends' activity. It was Facebook's second stab at making its feed more real-time in nature.
In 2012, Facebook made a number of tweaks to Timeline as it fudged with the design and layout of its radical redo to the member profile. By October of the year, Facebook hit the 1 billion-member milestone.
As it stands, Timeline remains the de facto member profile. In March of 2013, Facebook cleaned up Timeline by dumping the two-column format and adding application sections to feature each person's individual tastes in music, books, and other entertainment.
And don't forget about Facebook's mobile evolution. In July of 2008, Facebook released its first mobile application for Apple's iPhone. Before the app, there was "Facebook for Mobile," which launched in April 2006.
The company's mobile application has undergone a number of improvements to arrive at its current version, which finally feels fast and fluid. Thankfully, for its business at least, Facebook also has optimized its mobile apps to serve up ads. The social network ended 2013 with 945 million mobile monthly active users.