A cluster group takes a set of map pins and combines them into a circle icon with a pin count when they appear too close together to be seen properly. There are five settings for a map cluster group:
Name - This a name for the cluster group configuration. It is used to assign pins to a specific cluster group.
1-9 - The color to use for the cluster group when it contains between 1 and 9 pins.
10-99 - The color to use for the cluster group when it contains between 10 and 99 pins.
100-999 - The color to use for the cluster group when it contains between 100 and 999 pins.
Greater than 1000 - The color to use for the cluster group when it contains more than 1000 pins.