Gemini is an AI chatbot powered by the multimodal AI model Gemini Pro, which allows it to understand and generate text while also natively understanding and operating on other kinds of information such as images, audio, videos, and code. It can be used for various purposes including retrieving information from Google apps, summarizing articles and web pages, brainstorming content ideas, generating short copy, comparing research and data in a chart, giving travel and activity recommendations, creating AI-generated images, and more. However, Gemini has limitations such as hallucinations, lack of writing skills, forgetting to cite sources, and unreliability. It can be used as a valuable research tool but its accuracy needs improvement. Gemini is available for free at gemini.google.com and offers various features including extensions that allow it to access real-time information from other Google apps.