Data & Fields Mapping
The data tab is use for defining the FetchXML, which will define what sort of records you want to show on your map. You have the option of working with the primary entity or any other entity that the one has a relationship with, and you have two options; build your fetch XML or to load the default Fetch related to the entity. In this instance, based on the fields that you need on “fields mapping” tab, build your fetch XML.
Load Default: Will load the default FetchXML that set to the selected CRM entity.
Build: Will let you build the FetchXML, and you will be able to select what fields that you want to display, filter the data, group the data.
You can select the options on the field that you want to display on the map. These field options on the fields Mapping tab will be populated based on your FetchXML you build on the data tab. All the data you setting on the field mapping tab will use towards setting the pin on the map.