The world as we know it is rapidly becoming interconnected with new software and applications. The way we exchange information in this modern day and era has become almost instantaneous. Improvements in the way we socially connect can create great progress for humanity as a whole. Exchanging information online through social networking sites progress the quality and speed at which we advance into the 21st century.
There is possibly no quicker and easier way to exchange information than using social media sites. However, one must realize that any information posted on the Internet is not private. Regardless of privacy settings, it is possible for information to leak out. There is no reasonable expectation of privacy for anything posted on the Internet.
I think blogs would be a better medium to spread information.If you are talking about specific information which you would like to spread to a limited number of people like friends or classmates then social networking sites are good but if you would like to spread the information to a wider public then knowledge sharing sites,blogs or wikipedia would be better.