What is electrical potential difference?

The potential difference is the amount of work done to take a unit positive charge from one point to another point whereas Electric potential is the amount of work done to take a unit positive charge from one point to infinity or from infinity to one point. The potential difference has units Volt, where 1V is the amount of potential difference formed between two points when 1J of work is done on a charge of 1C to take it to one point from another point.

By the relation V = WQ