Memory is the ability to store thing that you experience and learn, ready for use in the future. Some things are remembered easily, such as dramatic events in our life. However, more ordinary things need to be rehearsed in the mind several times before they ‘stick’.
There are three different ways of storing memory. Sensory memory, which is very brief, tells you what is happening around you and allows you to move without bumping into things short-tem memory, which lasts for only about 30 seconds, and allows you to remember a phone number and dial it, but after a minute or so it will vanish. Finally long-term memory, for things that you have carefully memorized and learned.