Once you obtain your private pilot license, you may find that your flying under VFR (Visual Flight Rules) may be difficult or impossible in certain weather conditions. Obtaining your instrument rating makes your pilot's license much more versatile (and can make you a much safer pilot). It allows you to fly with lower cloud ceilings and decreased visibility, under IFR (Instrument Flight Rules). It requires additional training and instruction beyond what is required for a private pilot or commercial pilot certificate, including rules and procedures specific to instrument flying, additional instruction in meteorology and more intensive training in flight solely by reference to instruments. An instrument rating is required for most commercial flying jobs, and a must have for any airline.