Pushover indeed sends notifications but in combination with IFTTT you can let it do tasks in Tasker.
1 example.
In IFTTT i have configured a recipe for a RSS feed to send a notification with Pushover for every new item.
In Tasker i configured a profile that gets triggerd on a Pushover notification.
Profile, new event, plugin, Pushover notification (works also with Pushbullet, that is free)
Now i only need to get rid of the Pushover notification but i'll keep it for testing purpose for now.
It works way faster then configure a HTTP GET item in Tasker, I have another use case were i do need to use HTTP GET because there isn't a RSS feed available but i can reuse a previous profile i created earlier.