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