What is monitor in easy words?

In easy words, a monitor is something that watches, checks, or shows what is happening. It has two common meanings. As a noun, a monitor can be a screen, like a computer monitor, which shows you pictures, words, and videos from your computer. As a verb, to monitor means to keep an eye on something over time to see if it is working correctly or changing. For example, a teacher monitors students during a test to make sure everything is fair, a doctor monitors a patient's heartbeat to see if it is healthy, and a parent monitors screen time to manage how long kids use devices. Monitoring does not mean controlling directly all the time, it means observing and checking regularly so you can take action if needed. In everyday life, you monitor things like your budget, your health, or the weather. In simple terms, a monitor watches and informs, and to monitor means to watch and check carefully and regularly so you know what is going on and can respond when necessary.