The European Union has a massive but often unseen impact on our day-to-day life here in Ireland. Despite that, how exactly it all works can remain a bit of a mystery for a lot of people. John O’Brennan, a professor at the Department of Sociology at Maynooth University, leaves the Brussels jargon to one side and focuses on what the core institutions are and how they all interact with each other.The Explainer is brought to you by The Journal. Providing open access to valuable journalism in Ireland has been the aim of The Journal for a decade. You can contribute to ensure we can keep questioning, investigating, debunking, explaining and informing at www.thejournal.ie/contribute/This work is co-funded by Journal Media and a grant programme from the European Parliament. Any opinions or conclusions expressed in this work are the author’s own. The European Parliament has no involvement in nor responsibility for the editorial content published by the project. For more information, see here.