This document discusses how voice controlled devices are becoming more popular and important for marketing. It outlines 3 things marketers can do: 1) optimize website content for voice search, 2) ensure websites are voice friendly, and 3) create custom applications for voice platforms. It then discusses the types of custom assistants a company can create for the Google Assistant, including static, dynamic, entertainment, and transactional assistants. The document provides examples and costs for different types of assistants. Overall, it encourages companies to consider how a custom assistant can provide value and seize opportunities in the growing voice space.