Could you explain what is meant by a key in Redis and how it is used?

In Redis, a key is a unique identifier used to store and retrieve its associated value. Keys are used to access data in the Redis database.

Each key can store data of different types: strings, lists, sets, hashes, etc. For example, if you have a key "user:1001", it may contain information about the user with ID 1001.

Example of using a key in Redis:

SET user:1001 "Ivan Ivanov"
GET user:1001

Here, the key is "user:1001", and the value is "Ivan Ivanov". Keys allow quick access and management of data in Redis.