How to Explain Exploratory Testing?

Kristine Corbus wrote this:

to explain exploratory testing in 15 minutes.

How would you explain exploratory testing in a short time frame?

15 minutes?
I can try to summarize it in 10 seconds or so…
Exporatory testing is when you plan your tests, create scenarios and and execute tests in the same time.

However, I can also recommend this article - it also fits the 15 minutes time frame, I believe: