That’s a good question to start with.
The prime directive for technical communication: audience first.
Everything flows from that. As a technical communicator, my job is to deliver content without compromising its truthfulness or completeness.
I ought to write as if Yoda is perched on my shoulder: passing on knowledge and wisdom, and instilling confidence in my audience.
What is technical communication to you?
Note: As you might know, I blogged on the website for the company where I used to work. A couple of the links here are to posts where I develop each idea more fully.