The main purpose of the saga pattern is to enable the implementation of distributed transactions in a microservices architecture and it ensures data consistency across multiple databases in a microservices architecture. 

This pattern allows for the coordination of updates to multiple databases, and ensures that the data in all the participating databases remains consistent and correct, even in the face of failures or network disruptions. 

https://medium.com/design-microservices-architecture-with-patterns/saga-pattern-for-microservices-distributed-transactions-7e95d0613345