All that is needed is some simple software and space on a computer that is linked up to the network. Others only provide information to members or to those who pay a fee. If information is supplied for free, it may be because it is supplied through public or governmental resources, or, because there is advertising attached. Sometimes political or social action groups provide information on the Internet in order to promote a specific point of view. There are millions of Internet sites housed on computers everywhere.
Help is available to find the best information.
A good starting point is often the home pages of libraries. Librarians are trained to select useful information for the specific library clientele where they work. Many other area libraries also have web sites. Many of the pioneers of the internet recognized that the rapid growth of web sites would make it difficult for users to find appropriate material. Some private companies started up with the goal of reviewing web sites.