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