Mobile device cluster advertisement delivery

A computer program product comprising:

• at least one computer readable storage medium that includes all computer readable media except transitory propagating signals, and has computer readable program code embodied therewith, the computer readable program code, when read by a processor, configured to:
• identify among a plurality of mobile devices associated with a network a cluster of two or more mobile devices, the identification based at least in part on a relative displacement of the two or more mobile devices during a period of time being less than a maximum relative displacement;
• determine a movement speed of the cluster;
• and
• display an advertising message on each mobile device in the cluster that is relevant to the speed of the cluster.

A computer, comprising:

• a processor;
• a memory;
• and
• a program including a plurality of instructions stored in the memory that are executed by the processor to:
• identify among a plurality of mobile devices associated with a network a cluster of two or more mobile devices, the identification based at least in part on a relative displacement of the two or more mobile devices during a period of time being less than a maximum relative displacement;
• determine a movement speed of the cluster;
• and
• display an advertising message on each mobile device in the cluster that is relevant to the speed of the cluster.