ECB President Mario draghi said at a press conference following the central bank's board meeting that important changes had taken place in the resumption of negotiations. So what are these three factors? They are Cost-Per-Click's (CPC's); which is the sum of money Google pays in the market to a publisher after their ads are clicked by way of a visitor. Click-Through-Rates (CTR's); which is a percentage figure showing frequent AdSense ads are clicked divided by the quantity of unique visitors passing by having a particular site and also the third essential factor is traffic levels. According to the engine displacement, divided into a miniature (1 liter), light level sedan (1-1.6 liters), intermediate (1.6-2.5 litres), senior sedan (2.5 4 liters), limousine (4 liters).