Cache is a COMPONENT that transparently stores data so that future requests for that data can be served faster. The data that is stored within a cache might be values that have been computed earlier or duplicates of original values that are stored ELSEWHERE. If requested data is contained in the cache (cache hit), this request can be served by simply reading the cache, which is comparatively faster.

Otherwise (cache miss), the data has to be recomputed or FETCHED from its original storage location, which is comparatively SLOWER. HENCE, the more requests can be served from the cache the faster the overall system performance is. 

Caching is often considered as a performance-enhancement tool than a way to store application data. If u spends more server resources in accessing the same data repeatedly, use caching instead. Caching data can bring huge performance benefits, so whenever u find that u need to frequently access data that doesn’t often change, cache it in the cache object and your application's performance will improve

Cache is a component that transparently stores data so that future requests for that data can be served faster. The data that is stored within a cache might be values that have been computed earlier or duplicates of original values that are stored elsewhere. If requested data is contained in the cache (cache hit), this request can be served by simply reading the cache, which is comparatively faster.

Otherwise (cache miss), the data has to be recomputed or fetched from its original storage location, which is comparatively slower. Hence, the more requests can be served from the cache the faster the overall system performance is. 

Caching is often considered as a performance-enhancement tool than a way to store application data. If u spends more server resources in accessing the same data repeatedly, use caching instead. Caching data can bring huge performance benefits, so whenever u find that u need to frequently access data that doesn’t often change, cache it in the cache object and your application's performance will improve