Means: The following Shabad is in the melody of Raag Saarag,
written by the Fourth Guru - Guru Ramdas Jee,
to be sung in partaal (varying rhythms/taals).
ਰਾਗੁ ਸਾਰੰਗ ਬਾਣੀ ਭਗਤਾਂ ਕੀ ॥
Means: The following Shabads are in the melody of Raag Saarang, and is the Baani of Bhagat Sahibaan.