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