Stitching ground planes, the more the better?

[blapcb]

On a dual layer board there are ground planes on top and bottom. It is a good/best practice to stitch them with vias as much as possible? (i.e. the more the better?)

 

[cks3976]

In my opinion stitching copper pours on top and bottom layers to effectively get more copper area is a good plan. Equally spaced stitching (PTH) vias will do a better job than randomly scattered Vias.

 

[jiripolivka]

The count of the vias depends upon the signal frequency used. The shorter wave transmitted, the more and closer vias are needed.