Use language that your audience uses, rather than what your colleagues in the European Commission probably use.
If your audience is....
use terms like....
people looking for jobs in other EU countries
jobs abroad, live and work in another EU country
free movement/circulation of labour
companies wanting to do business with the Commission
tenders or contracts
Make sure that the user need(s) your writing is meant to meet is not already covered somewhere else on the Commission's web presence. Search for the subject on the site or ask a policy expert. If relevant content exists elsewhere, link to it, don't duplicate.
Here are a few examples (based on true stories) that could help you to understand how improvements can be made.
Title / URL
EUROPEAN COMMISSION | POLICIES, INFORMATION AND SERVICES
POLICIES, INFORMATION AND SERVICES | EUROPEAN COMMISSION
ABOUT THE EUROPEAN UNION | EUROPEAN COMMISSION
Technically fine, but it fails to show that you are in the Information part of the website, for example:
About the European Union - Policies, Information and Services | European Commission
That's too long (83 chars). Given that the context is clear, consider deleting the references to European:
ABOUT THE UNION - INFORMATION SERVICES | EUROPEAN COMMISSION
STRATEGY | EUROPEAN COMMISSION
It is not clear from the title which strategy is being talked about
STRATEGY AND ACTION PLAN OF THE EUROPEAN UNION | EUROPEAN COMMISSION
BETTER REGULATION: WHY AND HOW | EUROPEAN COMMISSION
"why", "and" and "how" are stopwords, their use should be avoided in titles
BETTER REGULATION IN THE EUROPEAN UNION | EUROPEAN COMMISSION
FIND A PARTNER | EUROPEAN COMMISSION
Search results for "Find a Partner in Europe" show dating sites as ads but EU/EC-related pages as indexed pages. Unfortunately we haven't made it to the first page yet, but wait for Valentine's Day.
FIND A PROJECT OR FINANCIAL PARTNER | EUROPEAN COMMISSION
DIRECTORATE-GENERAL FOR AGRICULTURE AND RURAL DEVELOPMENT | EUROPEAN COMMISSION
With this as the h1 heading, the page should be a page about DG AGRI itself. It's not. It's a page of Planning and Management documents related to DG AGRI. These are not the same thing.
The h1 heading should summarise precisely what the page contains.
Better titles would be: