Discuss the significance of effective organizational communication in optimizing business performance and fostering a positive work environment. Explain the role of communication in facilitating coordination, collaboration, decision-making, and conflict resolution within an organization. Explore different communication channels, barriers to effective communication, and strategies for overcoming these barriers. Analyze the impact of technology on modern communication within organizations, highlighting the benefits and challenges of digital communication tools. Furthermore, examine the role of leadership in promoting a culture of transparent and effective communication and discuss the implications of cross-cultural communication in today's globalized business landscape. Provide real-world examples of companies demonstrating effective communication practices and evaluate how these practices contribute to their success and employee engagement.