This document summarizes Amazon's Alexa Voice Service which allows device makers and skill builders to incorporate voice capabilities into their products and services. It notes that voice interactions are growing fast driven by devices with Alexa built-in, and that Alexa skills and devices that work with Alexa are expanding to over 70,000 products across 150 countries. The document outlines Amazon's vision for Alexa to be everywhere through built-in devices, skills, and connectivity to other products and services in the home, on the go and at work.