This document discusses best practices for internal communications based on a study of over 400 companies. It finds that employee engagement is the top goal of internal communicators. The biggest challenge they face is managing information overload. Email and intranet are the most used and effective channels currently, though video and social media are growing. The document offers tips for internal communicators to boost engagement, including making communications timely, targeted, relevant, personalized, and measurable. It stresses the importance of collaboration between internal and external communications teams.