Publishing information to Usenet is very easy, primarily because it is done with the same software which one uses to read news. The ease of answering to Usenet leads to discussion which is very open. Anyone with a connection to the net can participate. The topics may last hours or months. Furthermore, Usenet is archived.
Every word posted is, unless the author specifies otherwise, a matter of public record.
The web is technically different from Usenet in that published material is not spread automatically from server to server. The material resides on one server, a web server, and is delivered from that machine to whoever requests it, when it is requested. One major practical difference of the web is that publishing information is not nearly as rapid a process, it is far more difficult. This is a fairly complex process, since HTML is barely human-readable. Also, they must be uploaded to one's website, using different software from that used to view the web.