Besides the obvious reason that you want to get feedback, it’s also good for getting higher ranking in the store. The best way is to ask the user to review the app after it has started a number of times.
Read more here to get an introduction to how to use ReviewNotifier: ReviewNotifier NuGet package.
- How to increase your Windows Phone app ratings
- How to increase your Windows 8 app ratings
- Get more quality reviews for your Windows Style apps