AI Hub is a platform that offers prebuilt apps and tools to process various types of documents such as PDFs, Excel files, legal forms, and images of handwritten documents. It also provides the ability to create custom apps to automate workflows. The platform utilizes large language models to extract information from documents and provide quick answers to user queries. Users can sign in with their Google account to access all the features, process files up to 50 MB each, and try out all of AI Hub's apps and features. Registered preview accounts get 1000 free units to try out all of AI Hub's capabilities.