Wikipedia
The Eurogroup is the recognised collective term for informal meetings of the finance ministers of the eurozone, i.e. those member states of the European Union (EU) which have adopted the euro as their official currency.
The group has 19 members. It exercises political control over the currency and related aspects of the EU's monetary union such as the Stability and Growth Pact. Its current president is Dutch finance minister Jeroen Dijsselbloem.
The ministers meet in camera a day before a meeting of the Economic and Financial Affairs Council (Ecofin) of the Council of the European Union. They communicate their decisions via press and document releases. This group is related to the Council of the European Union (only Eurogroup states vote on issues relating to the euro in Ecofin) and was formalised under the Lisbon Treaty.