Privacy online. Once something expected is now a fable from the past. A bed time story at best, as explained by this article on how easily tracked we are today online.
To make matters worse, we are seeing a substantial increase in websites using these techniques to track our daily search habits and worse, determine various personal information about us as well.
Often this information then ends up with tracking companies who then find ways of making a profit from this kind of information. So how do we stop it? Well the best chance is to just minimize it rather than anything is to clear your cookies and consider using a browser such as Chrome, which provides a mode that eliminates blind cookie usage.