This application relates to apparatus and methods for automatically determining and providing item advertisements, such as for display on a website. In some examples, a computing device obtains a prioritized list of item advertisements for each of a plurality of item categories. The computing device also obtains an item category for each of a plurality of positions of a display interface. Each item category may correspond to one or more of the plurality of item categories. Further, the computing device determines, for each position of the plurality of positions of the display interface, an item advertisement based on the item category for the position and the prioritized list of item advertisements. The computing device generates display interface position data identifying the item advertisement determined for each position of the plurality of positions of the display interface. The computing device transmits the display interface position data to a web server.