My cleric in D&D, derp

ive never heard of D&D b4 x.x(needs to stay inside more)
can sum1 explain? x.x

Basically, it's a fantasy role-playing game which you play with a few other people. You can think of it as a game where one of your friends acts as the controller who tells the story and designs encounters, while the rest of you will play along and explore the controller's scenarios. It requires creativity; both in the controller and players themselves.