Depending on the other app you're syncing with, you'll see a number of standard TractionNext fields being mapped. For instance, a connection to Office 365 Outlook.com will look something like this:
PieSync syncs the default name field(s) that come with the apps. Sometimes they have a different structure in both apps you connect. E.g. first and last names are separate in app A and joint in a single field in app B. In the background, PieSync joins first and last names together from app A to B and separates them again from app B to A. Our algorithm is smart about which part it updates in app B.