It is known all too well that the world is in a constant state of flux. The best proof of this is the Google search engine. Google released the information that the free page, Google Product Search, will soon become a subscription service. As a result advertising clients will no longer have to pay for the click. The abbreviation CPC stands for cost per click and CPA signifies cost per action. A very well-known and popular site for pupils and students today asks for a click cost well over 10 cents. As advertising on the site is extremely targeted many companies are interested in advertising there. The Google shopping portal also provides targeted advertising to specific groups.