Teleconferencing allows participants in different locations to communicate and collaborate remotely through audio, video, and screen sharing. There are several types of teleconferencing including audio conferencing using phones, video conferencing with video capability, web conferencing combining video and screen sharing, huddle rooms for small group meetings, and virtual reality conferencing creating immersive virtual environments. Teleconferencing provides benefits like cost savings, increased productivity, and access to global talent, but also disadvantages such as technical issues, lack of non-verbal cues, and security concerns.