How to choose Via filled in PCB Design for Vias in PAD?

How to choose Via filled in PCB Design for Vias in PAD? Sophia Zeng Tue, 06/20/2023 - 14:40

Is anyone know how to confirm if I should make Via holes filled by resin or Via holes filled by copper?

[original story: Circuit Digest]

Circuit Digest 20 Jun 10:10