This document discusses different types of scaling in cloud computing: vertical scaling, horizontal scaling, and diagonal scaling. Vertical scaling involves adding resources like memory, storage, or processing power to a single instance. Horizontal scaling involves adding more servers. Diagonal scaling combines vertical and horizontal scaling by adding resources both to individual instances and by adding more instances. The document explains the benefits of cloud scalability, which include convenience, flexibility, cost savings, and improved disaster management by allowing resources to scale up or down as needed.