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