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