The level of detail users need about a topic is highly personal. Sometimes a user wants the full picture, but in our overloaded lives users often need the basic answer presented as concisely as possible, to let them move to their next task. Content presentation must fulfill both of these needs.
What some users think isn't enough many might respond with tl;dr (too long; didn't read). There are techniques for providing at once the quick answer and offering complete details for those who want them.
Web writing can help your users visually scan your content to quickly find just the info they need.