What Are Cookies?
Cookies are messages that web servers pass to your web browser when you visit some websites. Your browser stores each message in a small file. They are designed to hold data specific to a particular client and website, and can be accessed either by the web server or the client computer. These files typically contain information about your visit to the web page, as well as any information you've volunteered, such as your name.
Cookies and Our Website
What We Track?
Google Analytics Cookies (more info) https://developers.google.com/analytics/devguides/collection/analyticsjs/cookie-usage#HowGAUsesCookies