Web conferencing is a technology that brings events (recorded or live) to remote locations. Those events can include class sessions, meetings, training sessions, workshops, lectures and seminars, and presentations. People at various sites can participate as if they were attending in person.
The DoIT Tech Store sells discounted licenses for the use of Adobe Connect for Web conferencing.
Blackboard Collaborate is available on the UW-Madison campus for faculty and staff through the My UW-Madison Portal, Learn@UW and some Moodle installations.