EU citizenship rights:
A) Moving & living in the EU
As an EU citizen, you have the right to live and move within the EU without being discriminated against on the grounds of your nationality.
B) Participating in the political life of the EU
Every EU citizen has the right to vote and stand as a candidate in both local and European elections in the EU country they live in, under the same conditions as nationals of that country.
C) Petitions & complaints
You can petition the European Parliament to address either a personal need or grievance, or on a matter of public interest. The subject must fall within the EU’s remit (i.e. it mustn’t be something that is decided at local or national level) and must affect you directly.
D) Consular protection
If you are in a non-EU country and need help, as an EU citizen you are entitled to consular protection from the embassy or consulate of any other EU country, if your own country does not have an embassy or consulate in the non-EU country.
https://europa.eu/european-union/topics/eu-citizenship_en