Prototyping
Prototyping creates representations of a solution to explore how it works and learn before committing more resources
What it means, how it is used and where it comes up, with its related concepts.
What it is and how it works
It can use paper, interfaces, simulations or enacted services. Fidelity should match the question to be answered. A visual prototype can validate understanding, but it does not necessarily demonstrate technical feasibility or commercial demand.