A streaming license is obtained for those who wish to provide digital streaming of audio or video performances for up to 1 year. Purchase of this license entitles the performing group to place the audio or video file on their website for listening or viewing for a year.
A streaming license is NOT the same thing as a Mechanical or SYNC license. You need a streaming license for any downloadable content you may be providing for students/parents even if it is being provided for free to the student etc.