Huge Red Box around my artboard... what is it and how do i get rid of it?

Every time I open a new document/artboard (File > New), I have this huge red outline around my artboard.  Then, when I save things, it is saving it as the red box is my artboard edges, so everything I save ends up very small.  What is this and how do I get rid of it/keep it from populating when starting new?