Avoiding repeated expensive computations or DB calls.

• Category: SB Caching — part of the Spring Boot Tutorial on GoCareerGo
• Read the short summary above, then check the linked docs for full syntax/behaviour
• Interview tip: be ready to explain "Introduction to Caching" in one sentence, then back it up with a tiny example

// Introduction to Caching — minimal example
// See the Spring / Spring Boot reference docs for the exact API for this topic.