Reference map depicting the streets of London [Source]
What is GIS mapping?
GIS mapping is a process that helps users manage, organize, and analyze location-based data.
Combining traditional mapping with location-based data, it was created in an effort to transcend the limits of two-dimensional paper maps.
Easily the most common use for GIS software, GIS mapping is used freqently throughout most built-world industries.
Learn more about the basics of GIS in part one: What is GIS?