Shabad Guru is the Gyan Saroop of Akal Purakh, the divine knowledge, the Brahamgian – Shri Guru Granth Sahib Ji. Since it teaches us all of the divine laws it is known as the Guru. Also it is Guru because it takes away darkness from inside us and enlightens us with the true meaning of spirituality. It provides us with guidance to follow the Truth and become Truthful and serve the Truth. The entire GurBani is Shabad Guru (see Gur Shabad). Every Shabad of GurBani is the Shabad Guru. See See Shabad Ki Kamai.