| 摘要 |
A system enables tracking of specific ad impressions that are responsible for eliciting specific telephone responses to online ads. Each time the system receives a request from a user to present an advertiser's telephone number in an impression of an ad, the system generates a temporary telephone number for the advertiser. The temporary telephone number lasts for a limited lifetime, during which any incoming telephone call is automatically routed to a POC designated by the advertiser. Whenever a temporary telephone number is generated for an advertiser, the system associates the temporary telephone number with the ad impression in which the temporary telephone number is displayed. Preferably, each temporary telephone number is only presented once during its lifetime, such that each temporary telephone number is only associated with a single ad impression. Thus, any call to a temporary telephone number can only have been elicited by a single ad impression. |
