Campaign Zero is a project by Ian Macato, Chester Thai, Christian Valadez, and Sage Voorhees for CS50 that aims to provide local representative information for 25 major cities. It plans to develop a widget to showcase user engagement, allow reporting of broken links and outdated info, and provide targeted local information. It also wants to create a platform for sharing local knowledge and scale data entry by having volunteers sign up for data entry tasks through Google Forms.