It covers a pretty broad spectrum; but it includes areas such as: audio, video, lighting, projector, livestream, communications etc.
Yes, it is a ministry that is often done behind the scenes, yet is a blessing to so many every Sunday and throughout the week!
It's easy to get caught up in technology or the "cool" factor when it comes to media in the church.
If the technology becomes the focus and becomes more important than anything else, we have failed.