Voltage is the measurement of potential difference between two points. Like miles is a measurement of distance between two points.
In Electricity, what is the difference between Voltage and Potential Difference?
This is the last comment in the short link posted below. (And don't sweat the math.)
Definition of Potential Difference or Voltage---
After going through the above portion of voltage theory we can now establish a definition of potential difference, definition of voltage in few words. Which says
Voltage is the difference in electric potential energy per unit charge between two points. Voltage is the work to be done, upon an unit charge to move between two points, against a static electric field. A voltage which is a measure of electric potential difference, is the cause of electrical current to flow in a closed circuit.
https://www.electrical4u.com/voltage-or-electric-potential-difference/