Microsoft Smooth Streaming is a technology for delivering high-quality, adaptive streaming video and audio over the Internet. It uses a combination of client-side and server-side components to provide a smooth, seamless streaming experience, even over networks with varying bandwidth conditions.
Smooth Streaming provides a scalable, adaptable solution for delivering media content that is optimized for the user's device and network conditions. The technology is designed to work well with a range of devices and platforms, including Windows, iOS, Android, and Xbox, and it integrates with a variety of existing video workflows, making it easy to use in a variety of scenarios.
In a Smooth Streaming setup, the video content is stored on a server and segmented into a number of smaller chunks, each of which can be played independently. The client-side software can then dynamically select which chunks to download and play, based on the available bandwidth, to provide a seamless streaming experience. This adaptability makes Smooth Streaming a popular choice for delivering high-quality video content over the Internet.
https://en.wikipedia.org/wiki/Adaptive_bitrate_streaming#Microsoft_Smooth_Streaming_(MSS)