What economic coalition are most European countries a part of today?

Most European countries are part of the European Union (EU), a political and economic coalition that promotes economic cooperation, free trade, and integration among its member states. The EU facilitates a single market, allowing for the free movement of goods, services, capital, and people. Additionally, many EU countries use the euro as their common currency, further enhancing economic collaboration. Beyond the EU, some countries are also members of other regional organizations, such as the European Economic Area (EEA) and the Schengen Area.