"Hair removal can be either time-consuming (shaving) or painful (waxing, epilating). A recent survey totted up the hours women spend on such chores and discovered the one they loathe the most is shaving their legs. Professional laser hair removal focuses a laser on the skin at the area of hair growth. The follicles beneath the skin surface are removed, stopping hair from growing."
Source: The Daily Mail
A course of six to eight treatments is recommended to ensure the follicles are completely disabled and the hair will not grow again. After a complete course, hair growth will be permanently reduced and may stop altogether.
The benfits of laser hair removal are that it provides long-term (and in some cases permanent) hair removal and can be used on any area of the face or body.