Your question is MySQL Query Cache Benefits. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
Explain how MySQL query caching works and when it is beneficial versus when it can hurt performance.
Cover cache-key matching, invalidation behavior, workload characteristics, observability, and relevant differences between MySQL 5.7 and MySQL 8.0. Discuss how you would decide whether to use it, disable it, or replace it with an application-level cache.