New fields for Gmail contacts with improved import facility

Up until now, Gmail only supported some contact fields. Whenever someone imported their contacts from apps like Outlook and OS X Address Book, unrecognized fields were put into the contact's notes section.

Google has improved the contacts and added more contact fields (like birthday and website) and now store each of these fields separately, which makes syncing and round-tripping your data work better

Find more details at Official Gmail Blog:

Official Gmail Blog: New fields for Gmail contacts and better importing too