In 2000, 192 countries agreed upon eight 'Millennium Development Goals' to be met by 2015. As the deadline approaches, several processes are in place to develop a new set of goals. This is known as the 'post-2015' agenda.
The post-2015 agenda is being set by official UN processes, including a 'high level panel' led by the governments of Indonesia, Liberia and UK, and a General Assembly panel on Sustainable Development Goals - there are also public consultations at the national and global levels.
The
wikipedia page has a larger introduction.