What is Laravel advanced multi-level caching architecture (L1, L2, L3)?

Multi-level caching uses layered cache systems like in-memory, Redis, and database caching.

L1 cache is in-memory (application-level), L2 is distributed cache like Redis, and L3 is persistent storage like database. Laravel applications can implement this hierarchy to minimize latency and database load. Cache synchronization and invalidation across layers are critical challenges in this architecture.