If you work in and around any sort of company that is undergoing a digital transformation, you will almost certainly hear the term "API".
Short for Application Programming Interface, put simply it provides a way for one system to be used by another in an agreed way. In other words, you can run some specific functionality or process elsewhere (e.g. within you organisation or across the Internet) via a set of published instructions.
APIs aren't a particularly new idea (I've been working with them since the 1990s), but they have grown in prominence and usage as other technologies and approaches such as Digital and SaaS (software as a service) have become more popular. It is therefore very likely that at some point or another most large organisations will have built APIs for their customers, or for their internal use.
Some might therefore possibly state that we have currently "reached peak API use"... were it not for the likelihood that API development and adoption is set to increase further as more companies look to standardise and expand their digital integration capabilities.
It is also one of the reason's I called our company "Ideal Interface".