2.  To understand the power of social network sites, especially Facebook, you can watch this video:  https://www.youtube.com/watch?v=Y4Mnpz G5Sqc https://www.youtube.com/watch?v=Y4Mnpz G5Sqc

3.  Social networks are the fastest growing phenomenon on the Web, and the one that will most fundamentally change marketing as we know it.

4.  Two-thirds of the world's Internet population visit social networks. In highly developed markets, the percentage is even higher. ◦ In the UK, for example, the number is 80%. ◦ According to a survey by Anderson Analytics in the US, 71% of social network users said they could not live without them.

5.  Social networks are growing three times faster than Internet use as a whole.

6.  Twitter connects friends but also allows individuals to stream messages to those people who want to 'follow' them.  In many ways, Twitter has transformed social networking into micro-blogging that are called 'tweets'.

7.  Users are limited to messages of 140 characters to describe to their followers 'what they are doing now'.

8.  Depending on how many followers you have, your tweets may be able to influence a lot of people. In some extreme cases, such as with mega-celebrities, the reach of a person's Twitter feed can challenge traditional broadcast media.

9.  Celebrities such as Britney Spears and Oprah Winfrey each claim to have more than one million Twitter Followers.