Over the next few weeks, Facebook will begin notifying members that haven’t already selected an email address — those that have will be unaffected. This notification serves as a reminder that the email system exists, and Facebook hopes that will boost usage.
By combining addresses, Facebook has made it a lot easier for people to contact you. Once an individual has found your Timeline, he or she now knows your Facebook email address. While many people already favor existing email systems, anyone looking for a more unified experience across the social network might appreciate this update.