| 主权项 |
1. A computer implemented method, comprising:
receiving, by one or more computers, campaign criteria associated with an advertising campaign, the campaign criteria specifying characteristics of a target audience for the advertising campaign; identifying, by the one or more computers, placements having characteristics corresponding to the criteria, the identified placements being resources with which advertisements are presented; providing, by the one or more computers and for presentation, traffic measures for the identified placements, the traffic measures for each identified placement including a user count that indicates a number of users that have been provided the identified placement; receiving selection data specifying a selection of a group of placements that include at least two of the identified placements; determining, by the one or more computers, a sum of the user counts for the placements in the group of placements; determining, by the one or more computers and based on the traffic measures, a number of crossover users that were provided two or more different placements in the group of placements; determining, by the one or more computers and based on a difference between the sum of the user counts and the number of crossover users, an aggregate number of unique users that have been provided at least one placement in the group of placements, the aggregate number of unique users being less than the sum of the user counts and accounts for the number of crossover users and a number of different placements in the group of placements each crossover user was provided; providing, by the one or more computers, the aggregate number of unique visitors; and collecting performance data for advertisements presented at the group of placements. |
