The size of the messages you send out on Twitter are very limited, so you'll tend to ask brief questions or post brief answers or announcements. Be careful not to post sales pitches as your followers are expecting valuable information, not blatant “Buy 500 copies of our product today!”
You only have 140 characters for each Twitter message, so you'll want to be concise.
This isn't the right place for posting real content or a story, but you certainly can point to a blog or a Facebook page or your website where interested followers can read the rest of the story.
When you want to post a URL, consider using the TinyURL service so the URL you end up putting in your Twitter post doesn't take up too much of your limited 140 characters.
Twitter