What is caching

hello to all
my question is what is caching?

 

Caching is the temporary storage of content, such as HTML pages, images, files and web objects, for the benefit of offloading the origin web or application server and reducing the time required to deliver content to a client.

 

Caching refers to the strategy of keeping a copy of a page or image you have already seen; web browsers typically cache files that they display for you, and simply ask the server if the page has actually changed rather than always downloading the entire thing.

 

Caching is done so as to access a site faster in which sites content is saved in bots date base and thus are accessed faster .