A Few Facts About Snake Plant

This plant spreads by creeping, its stiff leaves grow up from a basal rosette.  Mature leaves are dark green with light gray-green cross-banding and usually range from 28–35" long and 2.0–2.4" wide.
It converts CO2 into oxygen at night. This plant also filters formaldehyde, trichloroethylene, xylene, toluene, and benzene from the air. 

  tolerant of low light levels and irregular watering

To propagate you can cut a leaf and place in water or cut a section(roots and all) off a place in pot.   I use the leaf in water method to bulk up my snake plant, as the babies grow off the leaf in the water just break off and place in soil of main plant.  One leaf will just keep giving you babies. I had one for over a year, it only died when we moved out of state.