The European Commission is the executive branch of the European Union (EU) and is responsible for proposing and implementing EU policies and legislation. It acts as the guardian of the EU treaties and ensures that member states and institutions comply with EU law.

Here are its key roles and responsibilities:

• Legislative Proposal: The Commission drafts and proposes legislation that aligns with the EU's interests. These proposals are then reviewed and debated by the European Parliament and the Council of the EU.
• Policy Implementation: It ensures that decisions made by the EU are implemented across member states, managing the EU budget and programs.
• Enforcement of EU Law: The Commission monitors compliance with EU laws and can take legal action against member states or organizations that violate them.
• Representation: It represents the EU in international trade negotiations and other global matters.

The European Commission is composed of a President and Commissioners, one from each EU member state, who are assigned specific policy areas to oversee. Its headquarters are in Brussels, Belgium. Let me know if you'd like to know more about its structure or specific functions!