Content item display states on user devices

A computer program product, comprising:

• a non-transitory computer-executable storage device having computer-executable program instructions embodied thereon that when executed by one or more computing devices cause the computer to provide content items on selected locations on electronic documents, the computer-readable program instructions comprising:
• computer-executable instructions to receive a content item to be displayed on user computing devices;
• computer-executable instructions to request to serve the content item in conjunction with an electronic document;
• computer-executable instructions to provide the content item to a user computing device for display;
• computer-executable instructions to determine that a particular amount of the content item was displayed for a particular amount of time on the user computing device;
• and
• computer-executable instructions to log that the content item was displayed on the user computing device in response to the determination.

A system to provide content items on selected locations on electronic documents, comprising:

• a storage device;
• and
• a processor communicatively coupled to the storage device, wherein the processor executes application code instructions that are stored in the storage device to cause the system to:
• receive a content item to be displayed on user computing devices;
• receive a request to serve the content item in conjunction with an electronic document;
• provide the content item to a user computing device for display;
• determine that a particular amount of the content item was displayed for a particular amount of time on the user computing device;
• and
• log that the content item was displayed on the user computing device in response to the determination.