A method of determining advertising content to be included in a broadcast is disclosed. An inclusion criterion is received for each of a plurality of items of advertising content to be used to determine one or both of whether and how that item of advertising content is to be included in a broadcast. Stored user profile data associated with a plurality of users who provided within an observation period an indication that the user was consuming the broadcast is processed, and the respective inclusion criteria of the items of advertising content, to select and integrate into the broadcast selected ones of the items of advertising content.