Cloud computing changes the landscape of IT infrastructure by enabling on-demand access to shared resources over the internet. This model allows businesses to scale their operations quickly without the burden of maintaining physical hardware and data centers. By leveraging services like IaaS, PaaS, and SaaS, companies can optimize their costs, improve collaboration, and enhance productivity. Additionally, cloud computing facilitates remote work and provides increased security features through centralized data management, reaffirming its critical role in modernizing IT strategies and fostering innovation across industries.