Glow is always on when it is plugged in, even if the Night Light and Air Status Indicator Light are off. If Glow is showing a solid non-gray color on your app, Glow is still functioning.
If the Button light is on, that means the device being plugged into Glow will have power. If the Button light is off, that means the device plugged into Glow will not have power.
For triggers to work, make sure to turn on the power of the device that is plugged into Glow in on.