I use it for two things. One, to fix an issue I'm having with my Note 4. Two, to launch audio apps.
1. My Note 4 has an odd issue which I was never able to figure out the cause. Every morning at 6:00 am it would turn the notifications volume up and also the other volume levels up to random levels. Needless to say, I didn't like the random noises at loud volume going off for some random email or other notification before it's time to wake up. My wife didn't either.
So I wrote a Tasker task to check & record every volume level all night long every 2 min until I could figure out when the volume was getting changed. Thinking this would help me figure out if it was consistent (maybe find the culprit) or random.
It helped me narrow it down the time to 6:00 am, consistently everyday but still random levels. I never found the true cause.
So I changed the same task to just set all the volume levels to zero everyday at 6:02 am. Problem solved, or at least masked with duct tape. :^) And I can literally rest easy now vs being shocked awake.
2. I created a task to run a simple tasker app (an overlay) so that whenever I plug in my headphones, it launches. It lists all the apps that have audio capabilities (the ones I choose). So I can easily choose what to listen to. Pretty cool. See the attached picture for what that looks like.