Copyright grants exclusive rights over creative works like books, music, art and movies for a limited time to promote creativity. It gives the creator rights to copy, distribute, adapt and publicly display their work. These rights expire after a set time period and the work falls into public domain for others to use freely. Copyright protects the expression of ideas but not ideas themselves. Performers and broadcasters also receive related rights over recordings and broadcasts of their performances. Various acts like education and criticism can make "fair use" of copyrighted works without permission.