From the “about” page:
Eurostat’s mission: to be the leading provider of high quality statistics on Europe.
Eurostat is the statistical office of the European Union situated in Luxembourg. Its task is to provide the European Union with statistics at European level that enable comparisons between countries and regions.
This is a key task. Democratic societies do not function properly without a solid basis of reliable and objective statistics. On one hand, decision-makers at EU level, in Member States, in local government and in business need statistics to make those decisions. On the other hand, the public and media need statistics for an accurate picture of contemporary society and to evaluate the performance of politicians and others. Of course, national statistics are still important for national purposes in Member States whereas EU statistics are essential for decisions and evaluation at European level.
Statistics can answer many questions. Is society heading in the direction promised by politicians? Is unemployment up or down? Are there more CO2 emissions compared to ten years ago? How many women go to work? How is your country’s economy performing compared to other EU Member States?
International statistics are a way of getting to know your neighbours in Member States and countries outside the EU. They are an important, objective and down-to-earth way of measuring how we all live.
I have seen Eurostat mentioned, usually negatively, by data aggregation services. I visited Eurostat today and found it quite useful.
For the non-data professional, there are graphs and other visualizations of popular data.
For the data professional, there are bulk downloads of data and other technical information.
I am sure there is room for improvement specific feedback is required to make that happen. (It has been my experience that positive specific feedback works best. Fine something nice to say and then suggest a change to improve the outcome.)