Sheetsu is a platform that enables users to transform Google Sheets into a database with a RESTful API. This service simplifies the process of integrating Google Sheets with various applications, allowing developers to leverage spreadsheet data without requiring extensive backend development. Users can perform standard database operations such as creating, reading, updating, and deleting data within Google Sheets through an API. Sheetsu is often utilized for rapid prototyping, managing backend services for apps, and streamlining workflows without needing complex infrastructure. The website for Sheetsu is http://sheetsu.com.