A chatbot can help automate team tasks, reduce delays in communication and reviews, and provide context to help teams collaborate more effectively across groups. It works by integrating with chat tools like Slack through scripts to perform functions like helping with PR reviews, enabling DevOps practices, and assisting teams when swarming on big problems or incidents. Chatbots are hired by installing tools like Hubot on a chat platform and setting up automated testing, continuous delivery pipelines, and analytics to ensure it works properly and continues to improve.