| 摘要 |
Methods, systems, and apparatus, including computer programs encoded on a computer-readable storage medium, including providing a method for receiving a request for content from a user device; transmitting a content item for display on the user device responsive to the request; wherein the content item includes contact information associated with a sponsor and instructions to obscure at least a portion of the contact information when the content item is first displayed on the user device; receiving an indication that a user has displayed complete contact information; and logging the indication. |
