Your question is DNS in Your Own Words. 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).
What's a DNS and explain it in your own words.
Explain the concept clearly to a non-specialist, then describe how a DNS lookup works when someone visits a website. Cover why DNS matters to product reliability and user experience, and distinguish DNS from web hosting or HTTP. Keep the explanation practical and use a simple analogy if helpful.