The document discusses the re-engineering of the Gita Supersite website from using client-side logic to server-side logic. Some of the key reasons for re-engineering included improving speed, managing a large number of objects in the database, and reducing network traffic. PHP was chosen as the server-side scripting language because it is platform independent, interfaces well with MySQL and other databases, and supports dynamic fonts with reduced network traffic. The re-engineered site using server-side PHP logic and a MySQL database provided benefits over the original version using client-side JavaScript and local fonts stored on users' machines.