The document discusses different forms of communication including social networks, Twitter, blogs, forums, and wikis. It provides an example of how a message on Twitter about a school shooting was quickly spread worldwide. While Twitter allows rapid information sharing, it raises questions about whether unverified information could endanger lives or if it is better to wait for confirmation from traditional news sources. Social networks are described as structures that connect individuals and organizations, with both advantages like staying in touch but also disadvantages like oversharing private details. Wikis are defined as websites that allow open collaboration and editing by users.