Cloud compute refers to the on-demand provisioning of computing resources (processors, memory, storage, and networking) from cloud providers as virtual machines or bare metal instances. It enables organizations to scale computational capacity dynamically without upfront hardware investment, paying only for what they use. At its core, cloud compute transforms fixed infrastructure costs into variable operational expenses while offering unprecedented flexibility in resource allocation. The fundamental distinction between instance types — general purpose, compute optimized, memory optimized, storage optimized, and accelerated computing — determines workload performance and cost efficiency, making instance selection the single most important decision in cloud architecture.