How would you explain a technical concept to a non-technical client?

I am preparing for software engineering and client-facing technical interviews, and I was asked how I would explain a technical concept to someone without a technical background.

I would like to understand:

What is the interviewer trying to evaluate with this question?
How can I explain complex topics, such as APIs, cloud computing, databases, or AI, in simple, easy-to-understand language?
What techniques or analogies can I use to avoid technical jargon while still conveying the main idea?
How should I structure my explanation to ensure the client understands the benefits rather than the technical details?
Could you provide a sample response or a real-world example of explaining a technical concept to a non-technical client?