A method for targeting delivery of advertising content, in an advertising campaign, to a consumer across two or more display devices used by the consumer, the method comprising: receiving a pricepoint and one or more campaign descriptions from an advertiser, wherein the pricepoint corresponds to an advertiser's budget for the advertising campaign, and wherein each of the campaign descriptions comprises: a schedule for delivery of at least a first advertisement and a second advertisement across the two or more display devices, the two or more display devices comprising a first device and a second device, wherein the first device is an online device and the second device is a television; and a target audience, wherein the target audience is defined by one or more demographic factors; defining a pool of consumers based on a graph of consumer properties, wherein the graph contains information about the two or more display devices used by each consumer, demographic data on each consumer, online behavioral data on each consumer, and similarities between pairs of consumers, each consumer of the pool of consumers having at least a threshold similarity to the one or more demographic factors defining the target audience; determining, from the pool of consumers, that a consumer is a member of the target audience; receiving a list of inventory from one or more content providers, wherein the list of inventory comprises two or more advertising time slots for TV and online; identifying two or more advertising time slots consistent with the one or more campaign descriptions, and wherein an overall cost for the one or more advertising targets is consistent with the pricepoint; purchasing the two or more advertising time slots wherein a first advertising time slot is delivered online; and a second advertising time slot is delivered within TV content; instructing a first media conduit to deliver the first advertisement to the first device; receiving a first datum from a first tag that accompanied the first advertisement to validate that the consumer viewed the first advertisement on the first device, wherein the datum comprises a confirmation that the consumer has seen the first advertisement; and responsive to receiving the confirmation that the consumer has seen the first advertisement, instructing a second media conduit to deliver the second advertisement to the second device. receiving a pricepoint and one or more campaign descriptions from an advertiser, wherein the pricepoint corresponds to an advertiser's budget for the advertising campaign, and wherein each of the campaign descriptions comprises: a schedule for delivery of at least a first advertisement and a second advertisement across the two or more display devices, the two or more display devices comprising a first device and a second device, wherein the first device is an online device and the second device is a television; and a target audience, wherein the target audience is defined by one or more demographic factors; a schedule for delivery of at least a first advertisement and a second advertisement across the two or more display devices, the two or more display devices comprising a first device and a second device, wherein the first device is an online device and the second device is a television; and a target audience, wherein the target audience is defined by one or more demographic factors; defining a pool of consumers based on a graph of consumer properties, wherein the graph contains information about the two or more display devices used by each consumer, demographic data on each consumer, online behavioral data on each consumer, and similarities between pairs of consumers, each consumer of the pool of consumers having at least a threshold similarity to the one or more demographic factors defining the target audience; determining, from the pool of consumers, that a consumer is a member of the target audience; receiving a list of inventory from one or more content providers, wherein the list of inventory comprises two or more advertising time slots for TV and online; identifying two or more advertising time slots consistent with the one or more campaign descriptions, and wherein an overall cost for the one or more advertising targets is consistent with the pricepoint; purchasing the two or more advertising time slots wherein a first advertising time slot is delivered online; and a second advertising time slot is delivered within TV content; instructing a first media conduit to deliver the first advertisement to the first device; receiving a first datum from a first tag that accompanied the first advertisement to validate that the consumer viewed the first advertisement on the first device, wherein the datum comprises a confirmation that the consumer has seen the first advertisement; and responsive to receiving the confirmation that the consumer has seen the first advertisement, instructing a second media conduit to deliver the second advertisement to the second device.