Voters across the EU go to the polls on 23-26 May to elect more than 700 MEPs – members of the European Parliament.
MEPs represent more than 500 million EU citizens from 28 countries.
The parliament is the only directly-elected EU institution.
After the MEPs are elected, most join bigger political groups in the EU parliament.
The main job of the EU parliament is to pass laws, working with ministers from the member states, who are collectively known as the Council.