Sometimes, users of your product are going to get stuck. Whether they’re a new user, there’s a feature they’ve not used yet, or the user simply doesn’t know where to start to do what they want to do, being able to get help is important. Providing help docs is a good first step, but they’re only useful if users can find what they need. Providing a hierarchy of topics that you can walk through as well as a search function will help in the majority of cases.