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