For me, it describes the state that so many of my clients are in when they seek help. They know that they have to make a big decision that could affect the course of their lives, but they are befuddled and don't know where to start. Sometimes a client will seek information in the expectation that it will help them to reach a decision, and sometimes it does - if their question is straightforward. But there is so much information out there (not all of it reliable), the accumulation of which can end up confusing matters even more. In addition, how information is applied to each person can be different, because we are all individuals.
The starting point of counselling of any sort, including careers counselling, is the client. It is a rare thing for anyone to have the space to talk about themselves, without fear of judgement, in daily life. Talking about what they like and dislike doing; what they think and feel about x or y; what is important to them; what they think they're good at, and why; what they think they're rubbish at, and why; their decision making style & what works for them etc. In career counselling, we help the client to find out about their true selves by "holding up a mirror" so that they can see the essence of their decision and a reflection of what they really think about it. Along the way, the counsellor helps to clarify a client's thoughts by asking questions, pointing out inconsistencies and possible blind spots, other interpretations of past events, and by pulling together threads that summarise what the client is saying. All of this, to frame the client's decision, and for them to be able to see the whole picture. This is the basis on which effective careers guidance depends.
From here, the path forward can be viewed more clearly.