Eventual consistency is a consistency model used in distributed computing systems. In this model, updates to a data store are not guaranteed to be immediately consistent across all replicas. Instead, the system ensures that the data will eventually become consistent after some time.

In eventual consistency, updates to a data store are propagated asynchronously to all replicas in the system. Each replica may have a different version of the data at any given time, but over time, all replicas will converge to a consistent state.

This model is often used in distributed databases and systems where it is not feasible or desirable to maintain strong consistency across all replicas due to network latency or other factors. It is important to note that eventual consistency does not mean that data inconsistencies will never occur, but rather that the system will eventually resolve them.