Some changes made to internet search engines included that of Google's search engine. Beginning in 2009, Google began to run a new system where the Google search became personalized. The item that is searched and the results that are shown remembers previous information that pertains to the individual. Google search engine not only seeks what is searched but also strives to allow the user to feel like the search engine recognizes their interests. This is achieved by using online advertising. A system that Google uses to filter advertisements and search results that might interest the user is by having a ranking system that tests relevancy that include observation of the behavior users exude while searching on Google. Another function of search engines is the predictability of location. Search engines are able to predict where one's location is currently by locating IP Addresses and geographical locations.