This release does not have a Play Store Description, so we grabbed one from version 2.0.0.169583061.gms:

Download this app to connect your Android Wear smartwatch with your Android phone. Android Wear watches let you:

• Choose from thousands of watch faces to express your style. Personalize your watch face with what matters to you: your steps, schedule, stock, or more.
• Check important info like who’s calling, SMS and messages, and alerts from your favorite apps. You can even speak, handwrite, type, use Smart Reply, or draw a quick response right from your watch.
• Get built-in fitness monitoring and coaching from your favorite running and fitness apps: Google Fit, Runkeeper, Runtastic, Strava, and more. Track your walks, runs, or rides, get coaching for strength training, listen to music, and even measure your heart rate (on supported watches).
• Android Wear watches have the Google Assistant* built-in. Ask it questions. Tell it to do things. It's your own personal Google. Just hold the power button or say "Ok Google" to get help from your Assistant.
• Download and use Android Wear apps like Google Maps, Uber, Foursquare, Google Play Music, WhatsApp, and thousands more of your favorite apps right on your watch.
• Express your style with watches like ASUS ZenWatch, Fossil Q Wander, Huawei Watch, LG Watch Style and Sport, Michael Kors Access, Moto 360, Nixon Mission, Polar M600, TAG Heuer Connected and more.

Learn more about Android Wear: www.android.com/wear
Buy an Android Wear watch: amazon.com/androidwear
For support: productforums.google.com/forum/#!forum/android-wear
*Google Assistant is not available in all languages.