Abstract: The present disclosure provides a computer-implemented graphical user interface for use in an advertising system. The computer-implemented graphical user interface for use in an advertising system comprises a template having a plurality of fields for receiving content relating to an advertisement, each field being prepopulated with a corresponding default value; wherein a first set of said fields is presented substantially in accordance with a layout of the advertisement. In one implementation, each of said default values is displayed in a default style and received values are displayed in a received style, said received style being different from said default style.