The average 'normal' cleaning rag pushes dust and dirt around, causing smearing or even worse scratching.
The Microfiber cloth grabs dust/grime particles and soaks away liquid (even oil) with its fantastic wicking action. Microfiber has a tendency to become electro statically charged which also helps with attracting/removing dust, hair and little 'fuzzies'. This material works wonderfully dry but is a whole other experience when dampened with water or a cleaner. Depending on what you're trying to 'sparkle up' will determine if your cloth should be wet or dry.