API definition: API is an abbreviation of the term Application Program Interface; it is a system that allows multiple pieces of software to communicate.
APIs are most often used by developers looking to create new tools. They can access an existing piece of software to use as a form of building block for their new software.
For example:
Facebook’s mobile phone app uses the phone’s API to transmit information to Facebook’s servers and retrieve information.
APIs are a common function of third-party marketing tools, especially for:
Because they require analytics data to be transmitted from one platform to a third-party dashboard.
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