Pi - Intelligent Presentation Document is a platform that utilizes AI technology to provide rich design elements and multimodal model construction for presentation document creation. It can integrate users' notes, PDFs, web pages, images, videos, and data to create content in any format. The product background indicates that Pi aims to provide elegantly structured content generation and design inspiration through AI intelligence and a knowledge engine, making it suitable for users in need of creating presentation documents. The product is positioned to improve the efficiency and quality of presentation document creation, although pricing information is not specified on the page.