Roughly speaking, we can distinguish two types of visualization:
Outcome visualization: In outcome visualization, you set yourself a goal and visualize what that goal will look like and how it will feel to have reached your goal. A good example is a tournament that you want to win. In outcome visualization, you visualize how you hold the trophy over your head and how that feels to go on TV as a winner.
Process visualization: In process visualization, you focus on the process to your victory. Step by step, you go through the process you need to go through to reach your goal. During your workouts, you focus on the moves you need to make, maintaining your focus, and how to dose your energy as best you can. In process visualization, the end goal is of secondary importance.
Of course, for both types of visualization, you indeed want to win. Only the approach is different. Everyone prefers their type of visualization technique. Athletes in more active situations will focus more on the process, while outcome visualization is used in passive and long-term stretches.