This question already has an answer here:
Is it safe to eat the skin of a baked or boiled potato, or are there any health or sanitary reasons not to eat it?
Contrarily, are there any reasons to eat it, e.g. does the skin contain vitamins or minerals which you would cut off by peeling?
EDIT: There is a related question Do I have to peel red potatoes before baking them? that asks specifically for red potatoes. This question covers yellow potatoes as well.