12. One or more non-transitory machine-readable media having machine-executable instructions configured to generating a dynamic creative for a plurality of individual interactions, comprising code for: providing a plurality of structures that are selectable from within a third party creation tool, wherein each of the plurality of structures is configured: to switch between a plurality of alternative selections when the creative is run, for graphically-manipulated insertion into the creative, and for integration into a script representing the creative, wherein the script is run on an end user device and the creative dynamically changes according to the plurality of alternative selections when run, locally, on a plurality of end user devices; receiving selection of a content group that correlates to the plurality of alternative selections; receiving selection of a target group comprising a plurality of attributes describing viewers of the creative; determining that a viewer of the creative is in the target group; selecting, after a user request, an alternative selection from the plurality of alternative selections based on the determination that the viewer of the creative is in the target group; processing the alternative selection with a structure from the plurality of structures to customize the creative to the alternative selection that is associated with the content group; receiving feedback, based on the plurality of individual interactions with the dynamic creative, on how the content group is being received by the target group; and modifying how often the plurality of alternative selections are presented in the script for the target group without regard to how the content group is being received by viewers.
12. One or more non-transitory machine-readable media having machine-executable instructions configured to generating a dynamic creative for a plurality of individual interactions, comprising code for: providing a plurality of structures that are selectable from within a third party creation tool, wherein each of the plurality of structures is configured: to switch between a plurality of alternative selections when the creative is run, for graphically-manipulated insertion into the creative, and for integration into a script representing the creative, wherein the script is run on an end user device and the creative dynamically changes according to the plurality of alternative selections when run, locally, on a plurality of end user devices; receiving selection of a content group that correlates to the plurality of alternative selections; receiving selection of a target group comprising a plurality of attributes describing viewers of the creative; determining that a viewer of the creative is in the target group; selecting, after a user request, an alternative selection from the plurality of alternative selections based on the determination that the viewer of the creative is in the target group; processing the alternative selection with a structure from the plurality of structures to customize the creative to the alternative selection that is associated with the content group; receiving feedback, based on the plurality of individual interactions with the dynamic creative, on how the content group is being received by the target group; and modifying how often the plurality of alternative selections are presented in the script for the target group without regard to how the content group is being received by viewers. 15. One or more physical machine-readable media having machine-executable instructions configured to generating the dynamic creative as recited in claim 12 , wherein the target group is a function of viewer attributes.