what does voltage describe?\no how fast current can flow\no how much current can flow\no how much a material…

Brief Explanations:

Voltage is the electric - potential difference between two points. It determines how much current can flow in a circuit according to Ohm's law ($I=\frac{V}{R}$, where $I$ is current, $V$ is voltage, and $R$ is resistance). It is not about the speed of current flow or conduction speed, and resistance is a different property that measures how much a material resists electrical flow.

Answer:

how much current can flow