What is a watt commonly defined as?

A watt is commonly defined as a unit of power, which measures the rate at which energy is transferred or converted. In the International System of Units (SI), one watt is defined as one joule per second, indicating how much energy is being used or produced in a specific timeframe. This is particularly important in electrical contexts, where power determines how effectively electrical devices convert energy into light, heat, or motion. Understanding the concept of power in watts is crucial for evaluating and comparing the performance and energy efficiency of various systems and devices.