Learn about WordPress Transients API.

In this article we dig into an important type of caching that is available to you in WordPress: transients. Like any cache, you use transients to store any

Complete guide.

Source: The Deal with WordPress Transients | CSS-Tricks

In this article Narayan Prusty demonstrates how you can easily cache data use the WordPress Transients API.

Additional info. Some are contradictive, but not so important.

Source: The Complete Guide to the WordPress Transients API