Answer: Cache
Step-by-step explanation:
Cache is a small amount of memory stored on the central processor for easy access for datas in the computer. Mostly in kilobyte.
Also cache is a hardware or software component that stores data so that future requests for that data can be served faster; the data stored in a cache might be the result of an earlier computation, activities or a copy of data stored.
Cache memory is an extremely fast memory type that acts as a buffer between RAM and the CPU. It holds frequently requested data and instructions so that they are immediately be reached available to the CPU when needed. Thats why if you noticed, when ever you delete some cache of some datas, they became laggy.