Explanation:

Bhagavatism centred around the worship of Vishnu or Bhagwat, and originated in post-Mauryan times. Vishnu was a minor God in vedic times. He represented the sun and also the fertility cult. By the second century BC he was merged with the God called Narayana. He was also called Bhagwat, and his worshippers were called Bhagavatas.
Bhagavatism or Vaishnavism which has contributed most in transforming the Vedic religion and giving it the meaning and the shape in which we find it at present and what we call Hinduism. Of course, Saivism has also participated in this transformation but Saivism is not opposed to Bhagavatism. Rather, it supplements it. and now both are integral parts of Hinduism.
Modern Hinduism still accepts the Vedic religious texts i.e., the Vedas, the Upanishads etc. as the sources of all their philosophies, and spiritual and religious ideas. But, the knowledge of these texts has remained confined only to a tiny minority of the Hindus. The religion which is practised practically by all Hindus in their daily life is, in reality, somewhat different.
The faith in the Puranas, the Ramayana, the Mahabharata, the Bhagavad Gita, theory of incarnations of God. attainment of salvation or Nirvana by bhakti i.e., intense love and devotion leading to complete surrender of self to the personal God, image-worship and chanting of prayers etc. which constitute the major part of the religious life of a modern Hindu, whether he be a Brahmana or a Sudra are the results of the religious movements and ideas which had their origin in this age.
The religious ideas and practices which grew up during this time were matured by the age of the Guptas and found their permanent place in Hinduism