title: How does Google tracking Cookie work?
body: <p>I had an incomplete order on one of my favorite websites.  I left the website and browsed to a coding resource website.  There I noticed an advertisement for the website I was on which I had not completed an order(the aforementioned site).  After doing some google, I came across some people saying that they had similar issues and cause was Google's tracking Cookie.  How could this work?  How can Google know which sites I am at through a cookie?</p>
  
  <p>Also, I am curious where this information(The cookie) info is stored so that I can look at it?</p>