It doesn't automatically Loop, you have to drag the music in as many times as you need to repeat.
Just put one after the other on the Timeline.
It Loops in the sense that the ending will flow into the beginning
Jill
A lot of the tracks have a looping version, so you can repeat them.
Otherwise you can easily split the track in PTE and duplicate part of it to extend it.
Just carefully listen to the music and look at the waveform to find the best part to duplicate
Jill