"Think about what people are doing on Facebook today. They're keeping up with their friends and family, but they're also building an image and identity for themselves, which in a sense is their brand. They're connecting with the audience that they want to connect to. It's almost a disadvantage if you're not on it now"

Mark Zuckerberg is suggesting that Facebook is a vital tool for individuals to develop an identity and brand name for themselves. He is implying that if you are not on Facebook, you are at a disadvantage. He is emphasizing the significance of getting in touch with the audience that you wish to link to, which people are utilizing Facebook to keep up with their friends and family. He is recommending that Facebook is an effective tool for people to produce an image and identity on their own, which it is important to be on it now. He is highlighting the importance of using Facebook to develop relationships and create a brand name for yourself.