What are connectors?

A connector is basically a ready-made API link. API stands for Application Programming Interface. An API allows other systems and software to provide an "input" to a particular system. This input allows different systems to communicate with each other and exchange data.

To simply explain an API, we often like to make the comparison with a plug and a socket. A socket can be seen as the system or the software. The plug, in this case, can be seen as the API. If the plug fits into the socket, then they can communicate with each other.