What is caching and why it is used in data science?

Caching enables content to be retrieved faster because a whole network trip isn't necessary. Caching are often necessary to save lots of various data files when the method of loading and/or manipulating data takes a substantial amount of your time . there'll be caching on the server where already computed elements might not got to be recomputed. once you want to access some data that takes a lot of your time and resources to look up, you cache it in order that subsequent time you would like to look up that very same data, the method of doing so is more efficient.