Coda is a supercharged document app that combines documents with spreadsheets and app-like user experiences, making it an essential tool for large-scale project management. By implementing Coda in their teams, Fred Castagnac and Sean Kennedy, product marketing managers at Zapier, have improved organization, data analysis, and collaboration. With Coda's relational database system, they can easily track project statuses and integrate with other tools like Jira and Slack, creating a centralized marketing management hub that streamlines their workflow and productivity.