1. Data Structures: Redis supports a wide range of data structures such as strings, hashes, lists, sets, and sorted sets. For example, you can store a list of user IDs in a Redis list.

2. Atomic Operations: All operations in Redis are atomic, which means that they are performed in a single step and cannot be interrupted. This makes Redis a great choice for applications that require high performance and data integrity.

3. Persistence: Redis supports data persistence, which means that the data stored in Redis can be written to disk and recovered in case of a system failure.

4. Replication: Redis supports master-slave replication, which allows you to have a backup of your data in case of a system failure.

5. Clustering: Redis supports clustering, which allows you to shard data across multiple nodes for improved scalability and performance.

6. Lua Scripting: Redis supports Lua scripting, which allows you to write custom scripts that can be executed on the server. This is useful for performing complex operations on data stored in Redis.

7. Pub/Sub: Redis supports the publish/subscribe messaging pattern, which allows you to broadcast messages to multiple clients. This is useful for applications such as chat rooms.

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