Cloud infrastructure refers to the foundational components and resources hosted in the cloud that support computing needs without the requirement for on-premises hardware. It includes virtual servers, storage, networking, and other essential services provided by cloud service providers like Amazon Web Services (AWS), Microsoft Azure, and Google Cloud Platform. Cloud infrastructure enables organizations to scale their IT resources dynamically, adjusting capacity according to demand spikes or growth without upfront investment in physical hardware. This flexibility fosters innovation and agility, allowing businesses to deploy applications faster, improve collaboration across teams, and achieve cost efficiencies through pay-as-you-go pricing models. Moreover, cloud infrastructure enhances resilience and disaster recovery capabilities by offering redundant data centers and automated backup solutions, thereby ensuring continuous operations and business continuity in the face of disruptions.