If you are getting notifications from HelperProtocol, then your Mac is infected with adware. HelperProtocol is adware for Mac.
HelperProtocol changes setting in your Mac. First, HelperProtocol installs a browser extension in your browser. Then, after HelperProtocol hijacks your browser, it modifies settings in the browser. For example, it changes the default home page, modifies search results, and displays unwanted pop-ups in your browser.