Web 1.0, or the read only web: The information on the internet was only for reading. It was network of documents and people could not interact with the content.
Web 2.0 or the social network: Users could not only receive information, but also create and share it. New services appeared and became popular, such as email, chats, videocoferences, forums, blogs, wikis and programs for person to person (P2P) file exchange.
Web 3.0 or the semantic web: New technologies allowed the integration of data and the web so that programs could understand and work with the information that they received. It has artificial intelligence.
