"Now" refers to the present moment, the time that is occurring at this very instant. It is the point in time that separates the past from the future. In philosophy and science, the concept of "now" is often discussed in relation to time perception and how humans experience the flow of time. In everyday life, "now" is used to indicate urgency or immediacy, as in "I need it done now." This can apply to various situations, from completing tasks to making decisions. Understanding "now" helps individuals prioritize their actions and focus on what is currently important in their lives.