Becoming an Irish citizen means that you are officially recognised as an Irish national and a citizen of the European Union. With this, comes the right to carry an Irish passport and live and work in Ireland and the EU.
Irish citizenship and Irish passports are granted to individuals who are born abroad to a parent who, although not born in Ireland, was otherwise an Irish citizen at the time of their birth.
As Irish citizenship is automatically passed down to direct descendants, someone who has an Irish-born grandparent may qualify to register as an Irish citizen. In order to claim this citizenship, you would need to demonstrate that your grandparent was born in Ireland. You would also need to provide evidence that proves this.
Speak to an immigration consultant for help with your Irish passport application.