Especially when looking at WordPress as a potential platform for web apps, understanding proper caching techniques is a must—and the Transients API is a powerful tool that sometimes goes unnoticed.

We’ll cover the basics and see easy examples, and then discuss common places where this method can be most helpful, like large, complex queries or pulling from an external API. We’ll also get into the details of the API, covering concepts like object caching, autoloading, and see some examples of more advanced setups.