There are several other names for powdered sugar. It is also known as icing sugar in the UK, and is often also referred to as confectioner’s sugar.
But all powdered sugar really is just regular granulated sugar that has been ground down by milling it into a powdered form.
The reason that powdered sugar is often favored over regular granulated sugar is because its fine grounding means that it’s more easily dissolved. This makes it the perfect sugar to use for frosting, icing, and adding glazes to baked goods. Or sometimes it just looks good sprinkled on top of your bakes to look like delicious snow.
But remember too much sugar is bad for you, so please enjoy it in moderation.