If you are getting notifications from CargoUltra, then your Mac is infected with adware. CargoUltra is adware for Mac.
CargoUltra changes setting in your Mac. First, CargoUltra installs a browser extension in your browser. Then, after CargoUltra 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.