when should you use different caching methods really it depends on what you need to do like for your basic web page

so i've been thinking a lot about caching lately, specifically when to apply different strategies. we often talk about client-side caching, cdn caching, and server-side caching (like redis or memcached). but when do you find yourself choosing one over the others? are there specific scenarios where, for example, client-side caching is just not enough, or when is it overkill to introduce a full cdn? curious to hear your experiences and best practices