From 2-spyware.com
![HelperService adware](https://www.2-spyware.com/news/wp-content/uploads/virusai/helperservice-adware-mac_en.jpg)
HelperService adware is a potentially unwanted program[1] (PUP) that affects macOS devices and displays an excessive amount of all kinds of advertisements (from fullscreen ads to pop-ups) that impede the normal browsing experience. It slows down the machine and the internet connection.