The Celsius scale is a temperature scale used to measure how hot or cold something is. It is based on the freezing point of water at 0 degrees and the boiling point at 100 degrees under standard atmospheric pressure. This scale is widely used in most countries around the world for everyday temperature measurements. The Celsius scale is part of the metric system and is commonly used in scientific contexts. It provides a straightforward way to understand temperature changes, making it easier to compare different temperatures in various settings, such as weather forecasts and cooking.