The Commission is independent of national governments. Its job is to represent and uphold the interests of the EU as a whole. It is headed by 28 Commissioners, one per country.
The European Commission is the 'engine room' of the EU. It is one of 3 main EU institutions; the other two are the European Parliament and the Council of the European Union.
The Commission prepares legislation for adoption by the Council (representing the member countries) and the Parliament (representing the citizens).
It administers the budget and the policy programmes (Agriculture, Fisheries, Research etc.) in cooperation with authorities in the member countries.