Explain how the Gupta rulers revived Hinduism.

The Gupta King were the followers of Vishnu. They patronised Vaishnavism. Temples were constructed to worship the various Hindu Deities. A lot of importance was given to the worship of the Avataras or incarnation of Vishnu.
The concept of bhakti or selfless devotion to God became popular during this period. Since this form of worship was simple, inexpensive and based on the faith and love of the devotee, it attracted a large number of followers.