Your question is Explain What an API Is. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
Describe what an API is.
Explain the concept in language appropriate for a non-technical product stakeholder, then briefly connect it to a practical product example such as the Algolia Search API. Cover what problem APIs solve, how a request and response work, and why access control and clear documentation matter. Keep your answer concise and distinguish an API from a user interface and an SDK.