Electronic categorization of sub-users of a database for receiving an electronic action

An apparatus, comprising:

• a segmentation server;
• a user server connected through a network to the segmentation server;
• a plurality of sub-user computing devices connected through the network to the user server and the segmentation server;
• wherein the segmentation server is configured to:
• a. receive a segmentation description from a user of the user server;
• b. retrieve user data from a database;
• c. translate the segmentation description to a standardized segmentation system vernacular based on the segmentation description and the retrieved user data;
• d. identify a set of individual criteria contained within the standardized segmentation description vernacular mapped to variable names;
• e. express the standardized segmentation system vernacular as a logical statement in terms of the variable names;
• f. parse each individual criteria of the set of individual criteria against sub-user data of the user data of the database in parallel yielding a representation of each criteria of the set of individual criteria;
• g. identify sub-users of a segment by logically combining the representation of each criteria according to the logical statement;
• and
• h. perform an electronic action directed to the sub-users identified by the segment, comprising:
• loading user-tracking code to a browser of each of the sub-users when each of the sub-users loads a webpage of the user;
• sending electronic messages to each of the sub-users identified by the segment, wherein different electronic messages include a display having a different behavior;
• sensing, by the user-tracking code, actions of each of the sub-users in response to receiving the electronic messages;
• and
• adjusting the different behavior of the display of the different electronic messages based on the sensed actions to improve a user interface of the display of the sub-users.