In design, layout is an important part. The quality of the layout result will directly affect the effect of the wiring, so it can be considered that a reasonable layout is the first step to a successful PCB design.
In particular, pre-layout is a process of thinking about the structure of the entire circuit board, signal flow, heat dissipation, and structure. If the pre-layout fails, all subsequent efforts will be in vain.
Whether a product is successful or not, one should pay attention to the internal quality, and the other is to take into account the overall aesthetics. Only when both are perfect can the product be considered a success.