Dry versus wet sanding drywall mud?

Thanks to all who answered about priming new drywall. Another question to all you experts who have helped me with this project. What is wet sanding and how do you go about it? I know it knocks down the dust, but is it a better method than dry sanding the dried mud? What materials are used for wet sanding,... show more Thanks to all who answered about priming new drywall.
Another question to all you experts who have helped me with this project.
What is wet sanding and how do you go about it? I know it knocks down the dust, but is it a better method than dry sanding the dried mud? What materials are used for wet sanding, and when is it done? So, advantages and disadvantages?
Thanks.
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