Very often in Simulink, it is desireable to have naming consistency between signals and certain blocks like inports, outports, tags, scopes, etc. These functions are examples of scripts that automatically apply such names according to certain stylistic rules explained in the sample model. This is partuclarly useful when used in a model's PreSaveFcn callback, as a way to reduce the manual effort of consistent naming while building a model.
Open the included model AutoNameTest.mdl and follow the instructions therein to see an example of how this works.