Should I use Ground plane or Power Plane?

Hi folks.
I had asked this doubt earlier…but I am still confused…
My question is that: If I can use a Ground plane or Power plane for my PCB , which option should I go for? Am I free to use either of them as per wish?
Also since I am also confused about track widths for my power tracks, will using a power plane avoid that problem?
And oh, what about Ground plane on one side and Power plane on other in my 2 layer PCB? Is this method even used commonly in PCB design?

I am complete beginner…so sorry for any stupid queries…
Any help is highly appreciated…Thank you so so much1

A post was merged into an existing topic: Ground plane vs Power plane…?

A post was merged into an existing topic: Ground plane vs Power plane…?