Voltage is a measure of electric potential difference between two points in a circuit. It indicates how much energy is available to move electric charges, such as electrons, from one point to another. The unit of voltage is the volt, and it is often represented by the symbol V. Higher voltage means more potential energy for the charges, which can lead to a stronger electric current. In practical terms, voltage is what drives electricity through devices like batteries and power outlets. For example, a standard household outlet in many countries provides a voltage of about 120 or 240 volts, allowing appliances to operate efficiently. Understanding voltage is essential for working with electrical systems and ensuring safety.