Being an Irish citizen means that you are formally recognised as a national of Ireland and a citizen of the European Union. It gives you certain rights, including the right to carry an Irish passport, live and work in Ireland and the EU, and receive consular help from Irish embassies and consulates abroad.
The Embassy of Ireland can only process applications for citizenship through Foreign Births Registration. All other applications for citizenship are the responsibility of the Irish Naturalisation and Immigration Service (INIS).
You are automatically an Irish citizen if one of your parents was an Irish citizen who was born in Ireland.
You can become an Irish citizen if one of your grandparents was born in Ireland, or you can become an Irish citizen if one of your parents was an Irish citizen at the time of your birth, but was not born in Ireland.