Caching is a basic concept in computing in which frequently accessed data is stored in a nearby location (called the "cache") so that it can be retrieved more quickly. Distributed caching is a caching technique in which the cache is distributed across multiple servers or machines.

Distributed caching has several important benefits, including:

Scalability: Having a very large cache on a single machine quickly becomes slower and more impractical. On the other hand, storing data in multiple locations allows each cache to remain small and lightweight, so that it can be easily searched for the relevant item.

Availability: Distributing the cache across multiple locations helps improve the cache's availability. 

https://redisson.org/glossary/distributed-caching.html