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