The simplicity and ease of use are the most valuable features. It's so much easier and quicker than writing an email to someone and waiting for them to read it.
Skype for Business facilitates virtual collaboration through global meetings, documentation sharing, and seamless integration with Microsoft Outlook. It offers tools to troubleshoot call quality and supports various devices and operating systems. However, it faces issues with stability, connectivity, and call reliability, especially in low bandwidth scenarios. Messaging lacks permanence, and there are challenges with scalability and integration with Microsoft Teams and third-party applications, which affect its ability to host large meetings efficiently.