"Google Computer Science Institute (GCSI) is a free online learning platform designed to provide students with the skills they need to excel in the field of computer science. The platform is powered by Google and offers a wide range of courses that cover the fundamentals of computer science, including programming, data structures, algorithms, and more.The GCSI app is the mobile version of the platform, allowing students to learn on the go. The app provides access to all the courses available on the platform, as well as additional resources and tools to help students stay on track and achieve their learning goals."