A myriad of things mostly based on location or time. I have profiles that change the way the phone behaves (notification volumes, screen on time, WiFi/Bluetooth state) based on a combination of where I am and what time it is. I also have profiles that pop up information depending on where I am (for example, the 8 digit door code at a place - it changes monthly, but is not really a secure location).
I’ve built a couple of mini apps in Tasker that do things like set up timers or interact with voice recording software. the other major use is to handle notifications for really repetitive apps (e.g. if people are chatting a lot in Messages, it slows the pace of notification sounds).
Edit: Apparently “Network Timeout” does not imply that your message didn’t get posted 😬
:q!