A concrete floor is often treated as a blank slab, something to be covered up with carpet or tile rather than considered a finished surface in its own right. 

A concrete garage floor takes a beating over the years. Tires grind road grit into the surface, dropped tools chip it, and oil stains soak into bare slab until scrubbing does nothing. 

A concrete floor left untreated is rarely as durable as it looks at first glance. Bare concrete absorbs stains,