Redis Masterclass: When to Use the In-Memory Data Store

Redis is an in-memory data structure store, not just a cache, offering sub-millisecond operations for hot-path data. It supports strings, hashes, lists, sets, sorted sets, and more for caching, rate limiting, queues, and real-time features. The tradeoff is RAM's volatility and cost, making Redis ideal for transient or fast-access data alongside a primary database.