Client-Side or Server-Side Caching? Which is better?

hey everyone, weve been talking a lot about caching lately, and i wanted to spark a discussion about where we put our caches. weve got some opportunities to cache data either on the client-side (in the browser or mobile app) or server-side (using redis, memcached, etc). each has its pros and cons, right? client-side caching can drastically reduce server load and improve perceived performance for repeat users. but managing cache invalidation and ensuring consistency across clients can be a real headache. server-side caching is often easier to control and update uniformly, but it doesnt offload as much work from the origin servers and can add latency if not implemented carefully. what are your experiences with client-side vs. server-side caching strategies? when do you prefer one over the other, and what are the biggest trade-offs youve had to make