An API, or Application Programming Interface, is like a menu in a restaurant. The menu gives you a list of dishes you can order, and similarly, an API provides you with options for interacting with a program or service.
For example, when you use an app to check the weather, that app uses an API to fetch the weather information from an online service. The API defines how to request that information and how it will be delivered in response. In essence, it’s a set of rules and tools that allow different programs to communicate and work together efficiently.