Cloud computing revolutionizes the way we manage accounts and IT resources, offering convenience through two main models: SaaS (Software as a Service) and IaaS (Infrastructure as a Service). SaaS involves monthly fees for hosted enterprise applications, while IaaS provides more flexibility with pay-as-you-use options, allowing users to manage their own applications and systems. The benefits of cloud computing include reduced capital expenditure, increased business focus, and efficient use of human resources.