A hybrid IT strategy takes advantage of both cloud and on-premises infrastructure to balance cost and performance requirements. Hybrid IT success goes beyond just determining which workloads to deploy in the cloud and which should run on a companys infrastructure. Public cloud Infrastructure as a Service (IaaS) environment provides the agility and scalability to rapidly accommodate peaks and troughs, so you only pay for the infrastructure needed at any given time. Public clouds are designed to maximise multi-tenancy to squeeze as many customers onto infrastructure. They also tend to offer services that are charged by the hour or the second.”]
Source: https://informationsecuritybuzz.com/articles/hybrid-it-three-pillars-that-underpin-success/