They are also portrayed to have flaws such as envy like other human beings. These deities are often depicted with unusually strong human qualities and they engage in direct interaction with humans. These deities were based on indigenous to Bengal (like Manasa) who had become assimilated in regional Hinduism. Mangalkavya were used to describe the greatness of particular Hindu deities known as "nimnokoti" (roughly translating as lower) by historians, because they were absent or unimportant in classical Hindu literature such as the Vedas or Puranas. They were read out in rituals extending from one "Mangalbar" (Tuesday) to the next.Listening to them was said to bring spiritual and material benefits ("mangal").But all these speculations are now firmly discarded by the recent school of intellectuals. Though some scholars of the early modern period tried to find out any other significance of the word Mangal that was frequently used in the medieval Bengali literature irrespective of any designated tradition. These are so named because it was believed that listening to these verses concerning the auspicious divinities would bring both spiritual and material benefits. The word Mangal-Kāvya comes out as an amalgamation of the two Bengali words, Mangal (Benediction) and Kavya (Poems). A new cosmogony was evolved, which is different from Sanskrit tradition but has an unmistakable affinity with the cosmogonic hymns in Rigveda and the Polynesian myth of creation". Lila Ray elaborates, "Indigenous myths and legends inherited from Indo-Aryan cultures began to blend and crystallise around popular deities and semi-mythological figures in the fourteenth and fifteenth centuries. The Mangal-Kāvya tradition is an archetype of the synthesis between the Vedic and the popular folk culture of India.
Each strain is composed by more than one poet or group of poets who are on the whole the worshipper of the god or goddess concerning their verses. But restraining the accounts of other deities, there are also minor Mangal-Kāvyas known as Shivāyana, Kālikā Mangal, Rāya Mangal, Shashtī Mangal, Sītalā Mangal and Kamalā Mangal etc. They are considered the greatest among all the native divinities in Bengal. Manasā Mangal, Chandī Mangal and Dharma Mangal, the three major genus of Mangal-Kāvya tradition include the portrayal of the magnitude of Manasā, Chandī and Dharmathakur respectively. The Mangal-Kāvyas usually give prominence to a particular deity amalgamated with a Vedic or Hindu mythological god and the narratives are usually written in the form of verses. "Poems of Benediction") is a group of Bengali Hindu religious texts, composed more or less between 13th and 18th centuries, notably consisting of narratives of indigenous deities of rural Bengal in the social scenario of the Middle Ages.