I'm not associated with redis, but I do use it daily. It's basically just a really good in memory db. You can use it for almost anything, from job queues, to message brokering, to session storage. Check out the different language clients, find you language of choice and read about how to fire it up and try it out https://redis.io/clients.
For example Celery supports a large number of message brokers, and a lot of people inexperienced with message passing etc. will use Redis as a broker because they already are familiar with it and running it in production. I myself made that mistake, and have since gotten much better results with the aforementioned change. So while it should seem obvious, theirs a lot of places where it is still accidentally done.
