Why were the avatars embraced by the deity in Vaishnavism?

To save the world from disorder and destruction

In the context of Vaishnavism, distinctive cults evolved around the various avatars or incarnations of the deity. Within this tradition, ten avatars were acknowledged. These forms were believed to be embraced by the deity to rescue the world from turmoil and ruin caused by malevolent forces. This concept of avatars gained varying popularity across different regions of the country. Unifying the religious fabric, recognizing these localized deities as forms of Vishnu helped forge a cohesive religious tradition.