Abstract: Contextualization services may deliver an advertisement to display on or within the real estate or boundaries of an image on a page being loaded. An agent on the client may contextualize a page being loaded or displayed to identify and send contextual data to the contextualization service of the server. The page may be designed, configured or constructed for placement of an advertisement as part of or over an image on the part, such as a footer of the advertisement. The contextualization service may use the contextual data to select a campaign from a plurality of campaigns to deliver an advertisement for the image. Based on the selected campaign, the contextualization service may send an advertisement to the agent for display as part of the image on the page.