The present invention relates to a sales aid in the form of a printed folded sheet, in particular a sales aid for print media or internet ads or the like. With the objective of providing a potential customer with an overview of the advantages and benefits the proffered services offer his company in the most efficient way possible in the shortest amount of time, the invention provides for the sales aid to comprise at least one supplemental sheet with supplemental information fields configured on its front and reverse sides and printed with predetermined supplemental information, wherein the supplemental sheet exhibits a lateral edge having at least one attachment section, and wherein the supplemental sheet is connected to the folded sheet by means of said attachment section such that said supplemental sheet can be folded open between a first position in which the reverse side of supplemental sheet is uncovered and a second position in which the front side of supplemental sheet is uncovered.