Responsive Design

Refers to the overall page layout and its ability to lead the user's attention through the page elements. Effective visual hierarchies create an appropriate balance in composition that draws users to top levels of the hierarchy while optimizing visual access to important page level elements.

A term used to refer to the basic content organization of the site and it’s navigation model. To be differentiated from the page level content, the user interface structure defines the "containers" for content and means for navigation to it.