On what basis did the ancient Arab literature "Light" spread?

Ancient Arabic literature was mainly oral poetry creation. There are leading poems, mourning poems, elegies and so on. In the 6th and 7th centuries, a genre of long poems called "Ghthit" appeared, which was the peak of poetry creation in this period. Ghthit wrote a series of themes, mainly praising heroes, satirizing enemies and praising benefactors, and created a new complex and flexible rhythm. Powerful language, vivid imagination and accurate metaphor have become the criteria for choosing poems in the future. "Sight Hit" was widely spread by "Ravi" (narrator and poet's assistant).