A certification protocol is a series of mandatory tests that certify all new vehicles on the market conform to the regulations. The goal is to verify that all vehicles respect pollution emission regulations, commonly referred to as emission standards. Euro 6 is the current standard.
The WLTP test takes place in a laboratory and is performed by independent organisations. They are based on standardised driving cycles (length, speed, equipment, temperature, etc) and measure pollutants, CO2 emissions and fuel consumption for combustion engine vehicles. These are standardised measurements that allow you to compare the performance of models from different manufacturers. Today, this data is published in brochures and on manufacturers’ websites.