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