I think I sometimes write like I'm making a first draft for a fantasy novel. Then people don't often understand some parts of what I say, at times. I wonder if I can achieve better results by being terse?
Your writing will vary according to your purpose. Much posting is what one might call chat. That will always be brief and simple - single sentences or maybe two. Or, you might be more interested in discourse, which is the treatment of topics that require more fleshing out. One wants to find the place between more words than are needed and too few to make one's point clearly. Should one include examples? Is this closely related topic worth broaching now?
[One choice would be to have ended this post with "broaching now," or even, "one's point clearly." Another would be to expand on these ideas more as I'm doing (expository discourse). The words here in brackets aren't needed, but to me, they help illustrate the topic, and thus add value. If your purpose is to capture the most attention, as with an announcement or advertisement, don't add it. Keep it a simple single idea and few words. But if your purpose is to explore ideas more fully like we're doing now, you'll need more words.]