The update should be pushed to your device automatically. But you can also manually download and install the APK using the following link:
The Google Play Store version 3.10.9 has the following new features and improvements:
- A new screen pops up when you start installing apps which helps you discover new apps based apps that other users have installed.
- Remove option added to ‘My Wishlist’, which allows you to cleanup your wish list.
- Store requests location based permissions for ACCESS_FINE_LOCATION and ACCESS_COARSE_LOCATION
- A new Translate buttom which appears next to app descriptions to translate them for you.
- An option to Improve Recommendations which appears above the ‘Recommended for You’ option. This feature is linked to Google+ to help improve recommendations based on your Circles.
source – Android Police