Slack is a cloud-based team collaboration tool that allows users to organize conversations around different topics into channels. It features direct messaging for more focused conversations, voice and video calls directly from the app, and notifications to centralize communication from various teams and projects. Files, links, and comments can be easily shared and are fully searchable. Slack also indexes file contents to allow searching within documents. The OneGov NSW team uses Slack to power their development lifecycle, integrating it with tools like Invision and including helpful bots and notifications to streamline collaboration.