There are many advantages of planning, from getting organized in terms of the daily to-do lists, logistics, teamwork, etc., These are all contributing to your efficiency and productivity.
However, more important than getting your ducks in a row, the effect it has on your perspective, perception, and mind-body-emotional wellbeing with the surprising (or not) knock-on effect of the flow of abundant prosperity into your business.
Perspective
The moment you have created a plan, you have a big picture summarizing the details. That big picture where you can see what you have planned at a glance gives you the power of stepping into the role of CEO of your business, allowing you to step back so that you can make strategic decisions.