This video is a great introduction for those interested in learning more about meditation.  Mingyur Rinpoche provides a simple explanation of what meditation is and why it is beneficial.  By comparing the constant flow of thoughts to that of a monkey mind, he describes meditation as the practice of learning to let go and giving your mind a rest.  Think we could all use a break from the monkey mind as it is said the mind releases 1000 thoughts per blink of an eye.