What's the difference between a location tag and a location section style?

A location tag in a template pulls in a specific field from the location table. This will pull the user’s anchor location information.

A location section style uses location tags, but it allows the end user to select from a range of locations.  The range of locations is dependent on the number of layouts created for the section style. 

Note: The range for a location section style CAN be just a single location.  This has the effect of allowing the end user to pick any location to populate automatically, not just their anchor location.