Parabolic SAR is a directional indicator and indicates pivots or reversals. So in other words when the sar is above the candle it's bearish...and when it flips below it, it's bullish and signifies a directional change in trend k!
It can be used in various timelines 15, 60, daily, weekly etc...the longer of a session you use it on...the greater the directional change of the sar indicator...which is why I always get hard up on Weekly SAR flips to the bullish side k cheers!