User-targeted advertising

A system comprising:

• a data processing apparatus;
• and
• a memory couple to the data processing apparatus having instructions stored thereon which, when executed by the data processing apparatus cause the data processing apparatus to perform operations comprising:
• for each user among a plurality of users, generating a structured data set that includes a plurality of attribute-value pairs, with each attribute-value pair specifying a characteristic of the user;
• receiving, from a content provider, a set of conditions that limit distribution of content to users having a matching structured data set having the attribute-value pairs that match the set of conditions specified by the content provider;
• determining how many of the users have the matching structured data set;
• presenting, in a user interface provided to a content sponsor, a visual indication of how many of the users have the matching structured data set;
• while presenting the visual indication of how many of the users have the matching structured data set, receiving, from the content sponsor, a revision to the set of conditions;
• determining a number of the users having structured data sets that match the revised set of conditions;
• and
• updating, within the user interface, the visual indication of how many of the users have the matching structured data set to present the number of the users having the structured data sets that match the revised set of conditions.

One or more non-transitory machine-readable storage devices storing instructions that are executable by one or more processing devices to perform operations comprising:

• for each user among a plurality of users, generating a structured data set that includes a plurality of attribute-value pairs, with each attribute-value pair specifying a characteristic of the user;
• receiving, from a content provider, a set of conditions that limit distribution of content to users having a matching structured data set having the attribute-value pairs that match the set of conditions specified by the content provider;
• determining how many of the users have the matching structured data set;
• presenting, in a user interface provided to a content sponsor, a visual indication of how many of the users have the matching structured data set;
• while presenting the visual indication of how many of the users have the matching structured data set, receiving, from the content sponsor, a revision to the set of conditions;
• determining a number of the users having structured data sets that match the revised set of conditions;
• and
• updating, within the user interface, the visual indication of how many of the users have the matching structured data set to present the number of the users having the structured data sets that match the revised set of conditions.