What it is: A simple in-memory caching system.

What it’s for:

• Simple cache use cases with very fast access.
• Good when you don’t need Redis features.

Key ideas:

• Simpler feature set than Redis.
• Often used for straightforward caching.

Hard words:

• *straightforward* /ˌstreɪtˈfɔːrwərd/: đơn giản, trực tiếp