Identify the key political priorities of the Assembly of European Regions (AER) for 2020-2025 as listed on their website. Additionally, describe 'The Bureau' and its primary role in AER's advocacy work, based on the information provided on the site.
Navigate to 'aer.eu'. Click on the 'Advocacy' link in the main navigation. Click on 'About Our Advocacy Work' within the Advocacy sub-menu to find information on 'The Bureau'. Identify and summarize the description of 'The Bureau' and its role in AER's advocacy work. Navigate back to the 'Advocacy' sub-menu (if necessary, by clicking 'Advocacy' again) and click on 'AER Political Priorities 2020-2025'. List the political priorities for 2020-2025 as explicitly stated on this page (excluding content from linked PDFs).
State that the full political priorities document is a PDF and the 'three main pillars' are not explicitly listed on the webpage. List the political priorities for 2020-2025 that are explicitly visible on the 'AER Political Priorities 2020-2025' page, such as: ensuring good governance, promoting decentralisation and subsidiarity, respecting and protecting social cohesion and cultural diversity, advocating for a stronger cohesion policy, reaffirming regional commitment towards Agenda 2030, and fostering a society based on equality. Accurately describe 'The Bureau' as the primary political voice of AER. Explain 'The Bureau's role in advocacy, including its engagement in pan-European and global issues and its function in establishing the political base for AER's advocacy work.