For me, the most important innovation in this world today is social networking sites. That’s the sites that link people and be social with them without any more boundaries of place and time. Social networking sites create a new paradigm of be social, and all the benefit of it could be experienced directly by us for free of charge. We just have to input our profile, and we are linked each other and being connected as social communities.
Social networking sites enable us to be expressive of what we want to show to the others. Medias from texts, videos, pictures, podcasts, and the other types of multimedia can be uploaded and be shared easily to others. This would make us be up to date to our close friends every time and anywhere.
Today, there are many social networking sites that exist on the internet. Lets say Facebook, Friendster, MySpace and Twitter. They are popular social networking sites that could apply activities such as sharing, update status, and many more to make us exist on the internet. We could add our profile and status on the internet and could be seen only by our friend that we add. This would create more personal relationship between us and our friends. With all the application which each sites offer, we could not only getting know each other, but we could challenged our friends through games or give special greets with gifts.
Beside only for existing our self on the internet, social networking site apparently used to do business. People often do promotion of their product and service through social networking sites. Many people thinks it’s very effective because, they apparently promote their products to their own friends that they already recognize it. So, the chance for their product to be purchase is larger than big commercial sites that reach more general customers. This would also beneficial for those who want to start a new business which would make the advertisement cost more efficient.
No wonder that today, many big name of social networking sites are offered a big number of money to be purchase by another bigger companies. For example, MySpace social networking site was bought for US$580 million by Rupert Murdoch News Corporation. Many big companies, realized that social networking sites are valuable to get income. The free of use, are applies to make many people use social networking sites, and by that, more advertisement can be shown and click more often by the users.
Social networking sites is getting reach the human needs as a social being. For me, this is one of most important innovation in the history of human being. 
