Whenever you talk, write, or make a hand gesture, you're communicating information. When you write a procedure for safely operating equipment, draw a diagram to show how a machine works, or explain to someone else how to use a computer program, you're communicating technical information.
Technical communication is the literature of science and technology.
If you have, you've used the product developed by a technical communicator. The information developed by science and technology must be recorded. Technical communicators produce material that conveys scientific and technical information precisely, accurately, and clearly. The projects that technical communicators work on are as varied as the companies and laboratories that do the research. Although producing online documentation or writing for technical publications may be a communicator's primary responsibility, she may also be expected to produce speeches, news stories, scripts for videos and films, or electronic publications.