AC power can be divided into single-phase and three-phase. In general, single-phase power is used where the electricity demand is low. In short, single-phase is usually used to run small equipment, while three-phase has a high electrical load and can run large machinery in factories. The main difference between single-phase and three-phase is that the former is used for domestic power and the latter is used to run heavy machinery. Below I will introduce the differences between them in more detail.
For practical applications, the choice of phase number needs to be judged by your needs. If you are only using it for domestic and residential use, a single-phase power supply requires only a small amount of power to run your mobile devices and household appliances for your daily needs. However, when you are running three or four air conditioning units, double-door refrigerators, and extra-large washing machines at the same time, it is recommended that you use a three-phase power supply to properly distribute each load.
Both single-phase and three-phase power supplies have their characteristics. Generally speaking, the choice of single-phase or three-phase power supply is based on your use environment, the use of demand as a starting point for consideration, there is no best, only more suitable for you.