Social media has become one of the most popular web
and mobile applications. According to a study1
from the
Nielsen Company, in 2010 the world spent over 110 billion
minutes, which equals to 22 percent of all time online, on
social-media related websites, such as Facebook, Twitter,
YouTube and Flickr. The time spent on these sites by an
average visitor increased by 66% over a year ago. Because
of the huge popularity and rich personal information available
on social media websites, companies or public figures
have now being increasingly willing and active in maintaining
pages on those websites to interact with online users,
attracting a large number of fans/followers by posting interesting
(product) photos/videos or text messages.