Definition - What does Web Conferencing mean?
Techopedia explains Web Conferencing
Although a number of Web conferencing tools have proliferated over the years, some companies like Skype, which offers free long-distance video calls via the Internet and which was acquired by Microsoft in May 2011, have been around much longer. Many other popular brands have been developed for enterprise Web conference. Many of these offer specific features such as call monitoring, multiparty collaboration and more.