In line with Google’s priority of strengthening communication between developers and their users, they have given developers the ability to reply to user reviews via the Google Play Developer Console. Responses by developers will appear publicly below the original comment in the Play Store. Once a developer replies to a user’s comment, the user will receive an email and can then either reply to the developer directly by email, or update their review.
Back in November, Play Store reviews became integrated with Google+, with the goal of less anonymity leading to higher quality comments. Today’s update strengthens communication a step further. It’s a feature that’s long overdue and should help improve app development.
Source: Android Developers Blog