PCB Technical - What are the differences between High Frequency PCB and Low Frequency PCB?

What are the differences between High Frequency PCB and Low Frequency PCB:
In high-frequency circuit design, the power supply in the form of a layer is much better than the main trace design in most cases, so that the circuit can always follow the path of least impedance.In addition, the power board has to provide a signal loop for all generated and received signals on the PCB, which minimizes the signal loop and thus reduces noise, which is often overlooked by low-frequency circuit designers.
In the design of HF PCB, we should follow the following principles:
Unity and stability of power source and ground.
Careful wiring and proper termination can eliminate reflection.
Careful wiring and proper end connections can reduce capacitive and inductive crosstalk.
Noise suppression is required to meet EMC requirements.
Low frequency circuit
Single point grounding: the grounding of all circuits and equipment must be grounded at a point in the entire circuit system
Connect to this junction point and use this point as a reference point for circuits and equipment