Jap ji begins with Mool Mantra and is followed by 38 pauris (stanzas) and ends with a final Salok at the end of this composition.
Jap ji is believed to be the first composition of Guru Nanak and is now considered the comprehensive essence of Sikh faith. It is regarded amongst the most important Bani or 'set of verses' by the Sikhs as it is the first Bani in Nitnem.
Notable is Nanak's discourse on 'what is true worship' and what is the nature of God'. In Jap ji it is stated that God is indescribable; the only true form of worship is worship of Nam (inner Word Sound Power) realization of God and to remain always in the Holy Will of that loving God accomplished with the grace of the True Guru.