Cloud computing platforms support scalability for businesses by allowing them to dynamically resize their IT resources based on demand. Services like AWS (Amazon Web Services) and Microsoft Azure offer flexible resources that can be deployed quickly, enabling businesses to scale operations without heavy upfront investments in hardware. This elasticity allows organizations to adjust to market changes, accommodate growth, and optimize costs by paying only for what they use. Additionally, cloud platforms offer automated management capabilities that further enhance scalability, ensuring robust performance during peak times.