Cloudstitch is a platform that allows users to create and manage web applications using simple spreadsheets as a backend. It aims to make web development more accessible by enabling non-programmers to use familiar tools like Excel and Google Sheets to power their web apps. Users can update app content, logic, and design by modifying their spreadsheets, which then automatically sync with the application. This approach eliminates the need for traditional database management or complex programming, simplifying the process of building functional web applications.