An HTTP cookie (also called web cookie, Internet cookie, browser cookie), is a small piece of data sent from a website and stored in a user's web browser while the user is browsing that website. Every time the user loads the website, the browser sends the cookie back to the server to notify the website of the user's previous activity. Source: Wikipedia.
We normally use "third-party cookies" with Google Analytics to remember what a user has done on previous pages / interactions with the website. If you want to find out more on Google Analytics service please go to Google Analytics Cookie Usage on Websites
If you want to opt out from our cookie tracking service please disable them going to your browser settings, in the privacy settings click the Content settings button and choose your preferred setting.