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