Time is a concept that helps us understand the sequence and duration of events. It allows us to measure how long things take and when they occur, using units like seconds, minutes, and hours. Time is often represented on clocks and calendars, which help us organize our daily activities and plan for the future. In physics, time is considered a dimension, similar to space. It plays a crucial role in theories like Einstein's theory of relativity, which shows that time can vary depending on speed and gravity. This means that time is not absolute; it can be experienced differently under various conditions.