US7933798B1
patent
An advertisement associated with a bid and a budget for placement of the advertisement is received, and a determina tion as to whether to present the advertisement is made. A number of times the advertisement is presented is calculated, and the number of times the advertisement is not presented is calculated. An impression share statistic for the advertise ment is calculated based on the calculation of the number of
25 claims. 61,202 characters of text.