According to Redis homepage, Redis is an open source (BSD licensed), in-memory data structure store, used as a database, cache and message broker.
It supports various data structures such as Strings, Hashes, Lists, Sets etc.
Caching is the process of storing some data in Cache. Cache is a temporary storage component area where the data is stored so that in future, Data can be served faster.
So that was just the introductory part of what you can do with Redis. Redis is extremely powerful and even I am also using on daily basis for the faster performance of data being transmitted between the applications.
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