"While Incognito can help keep your browsing private on your device, it doesn’t make you invisible. Websites you visit, including Google sites, and organizations that manage your network, like your school, employer, or internet service provider, may be able to observe your activity in Incognito. Websites you visit that use Google services also share information about your activity on their sites with Google, including for advertising purposes, as described in the Privacy Policy."
-Google