Larivaar is where Gurbani is written in continuous form as shown above (ie. with no breaks in between the words of Gurbani). This form of writing was used by the Sikh Guru Ji's and other historical Sikhs.
Gurmat, counsel or tenets of the Guru, more specifically focusing the mind towards the Guru is a term which may in its essential sense be taken to be synonymous with Sikhism itself. Etymologically, Gur means wisdom and Mat means Tenet/ Belief. Generally, Gurmat is theology includes teachings of Sikh Bhagats and Sikh Gurus which is incorporated in Guru Granth Sahib.
Sikh historical writings, unauthentic writings or apocryphal compositions in name of Sikh Gurus and other writings by Sikhs are not considered as Gurbani and are referred to as Kachi Bani.
The following are articles of cover the importance of Larivaar Gurbani.
'How can that which was improper, inappropriate and harmful for the Panth up to 1950, be beneficial for the Panth, appropriate and proper now? How can yesterday's manmatt (egoistic knowledge) become today's Gurmatt (Guru-centred knowledge)? The haste with which larivaar (connected words) forms (of Sri Guru Granth Sahib) are being taken out of sight is leading the Sangat (holy congregation) to believe that larivaar (connected word) form is improper and harmful for the Panth.'
Gurmat Gyan (Knowledge)
Other Gurbani Contributors