Groups in Creo represent sets of contiguous features that act as a single feature for specific operations. Individual features are affected by most operations while some operations apply to an entire group:

User defined Features (UDFs) are groups of features that are stored in a file. When a UDF is placed in a new model the created features are automatically assigned to a group. A local group is a set of features that have been specifically assigned to a group to make modifications and patterning easier.