Gross advertising expenditure refers to the total amount of money spent by a company or organization on promoting their products or services through various forms of media, such as television, radio, print, and digital platforms. This includes all costs associated with creating, producing, and distributing advertisements, as well as any fees paid to advertising agencies or media outlets. It is a key measure of the overall investment made by a company in its marketing efforts and is often used to evaluate the effectiveness and reach of advertising campaigns.