Found Here:  https://sustainabledevelopment.un.org/sdgs

This is the jumping off point for the UN Sustainable Development Goals which hosts all 17 of the goals.  It would be good for you to look through the various goals and get an overall understanding of how the UN is looking to define sustainable development from a holistic point of view.

https://www.undp.org/content/undp/en/home/sdgoverview/mdg_goals.html

The Millennium Development Goals by the UN was the precursor to the SDGs which had a more pointed focus certain types of nations and on certain types of problems.  It claims to have been extremely effective at fighting poverty specifically.  Based upon these concepts and the experience the UN has developed with these goals, they looked to have more global, universal, and ambitious goals which aim to stop future problems instead of just responding to them.