Web conferencing is used to conduct live meetings or presentations over the Internet. In a web conference, each participant sits at his or her own computer and is connected to other participants via the internet. This can be either a downloaded application on each of the attendees computers or a web-based application where the attendees will simply enter a URL (website address) to enter the conference.

A webinar is a neologism to describe a specific type of web conference. It is typically one-way , from the speaker to the audience with limited audience interaction, such as in a webcast. A webinar can be collaborative and include polling and question & answer sessions to allow full participation between the audience and the presenter. In some cases, the presenter may speak over a standard telephone line, pointing out information being presented on screen and the audience can respond over their own telephones, preferably a speaker phone. There are web conferencing technologies on the market that have incorporated the use of VoIP audio technology, to allow for a truly web-based communication. Webinars may (depending upon the provider) provide hidden or anonymous participant functionality, enabling paticipants to be unaware of other participants in the same meeting.

In the early years of the Internet, the terms "web conferencing" was often used to describe a group discussion in a message board and therefore not live. The term has evolved to refer specifically to live or "synchronous" meetings.

Features

Other typical features of a web conference include:

• Slide presentations (often created through PowerPoint or Keynote on a Mac)
• Live video (via webcam or digital video camera)
• VoIP (Real time audio communication through the computer via use of headphones and speakers)
• Web tours - where URLs, data from forms, cookies, scripts and session data can be pushed to other participants enabling them to be pushed though web based logons, clicks, etc. This type of feature works well when demonstrating websites where users themselves can also participate.
• Recording (for viewing at a later time by anyone using a unique web address)
• Whiteboard with annotation (allowing the presenter and/or attendees to highlight or mark items on the slide presentation. Or, simply make notes on a blank whiteboard.)
• Text chat - For live question and answer sessions, limited to the people connected to the meeting. Text chat may be public (echo'ed to all participants) or private (between 2 participants).
• Polls and surveys (allows the presenter to conduct questions with multiple choice answers directed to the audience)
• Screen sharing/desktop sharing/application sharing (where participants can view anything the presenter currently has shown on their screen. Some screen sharing applications allow for remote desktop control, allowing participants to manipulate the presenters screen, although this is not widely used.)