Magic AI is a free AI tool that assists with writing tasks, such as drafting messages, updating forms, and completing repetitive tasks. It offers text expansion, autofill, and data extraction features to save time and improve accuracy. Magic AI also uses chatbots powered by GPT-3.5 and integrates with various apps like Gmail, Salesforce, and LinkedIn. The tool is available as a Chrome extension and does not require an OpenAI API key.