Here's why:

* Efficient transmission: AC electricity can be easily and efficiently transmitted over long distances using transformers. This is crucial for power grids that distribute electricity to homes from power plants.

* Easier to convert: AC can be easily converted to different voltages using transformers, making it suitable for various appliances and devices.

* Historical reasons: The early development of power grids and appliances relied on AC technology, and it has remained the standard ever since.

While direct current (DC) is also used in certain applications like battery-powered devices and some electronic circuits, AC is the dominant type of electricity used in homes and most other applications.