Google Analytics uses a set of cookies to collect information and report site usage statistics without personally identifying individual visitors to Google. ‘_ga’, the main cookie used by Google Analytics, enables a service to distinguish one visitor from another and lasts for 2 years. Any site that implements Google Analytics, including Google services, uses the ‘_ga’ cookie. Each ‘_ga’ cookie is unique to the specific property, so it cannot be used to track a given user or browser across unrelated websites.
Google services also use ‘NID’ and ‘ENID’ cookies on Google Search, and ‘VISITOR_INFO1_LIVE’ and ‘YEC’ cookies on YouTube, for analytics.
Most browsers allow you to manage how cookies are set and used as you’re browsing, and to clear cookies and browsing data. Also, your browser may have settings letting you manage cookies on a site-by-site basis. For example, Google Chrome’s settings at chrome://settings/cookies allow you to delete existing cookies, allow or block all cookies, and set cookie preferences for websites. Google Chrome also offers Incognito mode, which deletes your browsing history and clears cookies on your device after you close your Incognito windows.